# Write a system of two linear equations that has one solution

History[ edit ] Historically, equations of motion first appeared in classical mechanics to describe the motion of massive objectsa notable application was to celestial mechanics to predict the motion of the planets as if they orbit like clockwork this was how Neptune was predicted before its discoveryand also investigate the stability of the solar system. It is important to observe that the huge body of work involving kinematics, dynamics and the mathematical models of the universe developed in baby steps — faltering, getting up and correcting itself — over three millennia and included contributions of both known names and others who have since faded from the annals of history. In antiquity, notwithstanding the success of priestsastrologers and astronomers in predicting solar and lunar eclipsesthe solstices and the equinoxes of the Sun and the period of the Moonthere was nothing other than a set of algorithms to help them.

In a system of linear equations, each equation corresponds with a straight line corresponds and one seeks out the point where the two lines intersect. Example Solve the following system of linear equations: This is our solution and we may refer to it as a graphic solution to the task.

But how does one reach a solution if the lines never intersect?

One cannot, the system of equations have no solution. One may also arrive at the correct answer with the help of the elimination method also called the addition method or the linear combination method or the substitution method. We select the first equation: The elimination method requires us to add or subtract the equations in order to eliminate either x or y, often one may not proceed with the addition directly without first multiplying either the first or second equation by some value.

Therefore we must multiply the second equation by 2 on both sides and get: We commence with the x-terms on the left, and the y-terms thereafter and finally with the numbers on the right side: We select the first:In this section give an in depth discussion on the process used to solve homogeneous, linear, second order differential equations, ay'' + by' + cy = 0.

## Expressions & Equations | Common Core State Standards Initiative

We derive the characteristic polynomial and discuss how the Principle of Superposition is used to get the general solution. A General Note: Types of Linear Systems.

There are three types of systems of linear equations in two variables, and three types of solutions. An independent system has exactly one solution pair $\left(x,y\right)$.

Edit Article How to Solve Systems of Algebraic Equations Containing Two Variables. In this Article: Article Summary Using the Substitution Method Using the Elimination Method Graphing the Equations Community Q&A In a "system of equations," you are asked to solve two or more equations . Write a system of two linear equations that has. a) only one solution,(2,3). An easy way to do this one is to use the slope intercept form y = mx + b. where m is the slope of the graph and b is the value where the graph crosses the y-axis. For the first linear equation let's say the slope is Then it's slope intercept form becomes y = -2x + b. In other words, it is where the two graphs intersect, what they have in common. So if an ordered pair is a solution to one equation, but not the other, then it is NOT a solution to the system.

The point where the two lines intersect is the only solution. In other words, it is where the two graphs intersect, what they have in common.

So if an ordered pair is a solution to one equation, but not the other, then it is NOT a solution to the system.

## Example 2: Writing An Equation Based on a Graph

Algebra -> Coordinate Systems and Linear Equations -> SOLUTION: Write a system of two linear equations that has. a) only one solution,(5,1).

a) only one solution,(5,1). b) . A linear system that has exactly one solution.

## Solving linear systems by substitution (old) (video) | Khan Academy

Substitution Method A method of solving a system of equations when you solve one equation for a variable, substitute that expression into the other equation and solve, and then use the value of that variable to find the value of the other variable.

Interchanging two equations of a system of linear equations is a .. that produces an equivalent system row operation A system of equations is called.

if the number of equations differs from the number of variables in the system.

Systems of Linear Equations and Word Problems – She Loves Math