# Use Substitution and Elimination to Solve the Linear Equation.

Not what you're looking for?

Please solve the following system of equations using both of these methods (solve once using substitution and once using elimination):

-4x+9y=-71; 3x-y=13 and -2x+3y=9; -4x+6y=18

Also, can you show you work so I can understand. Thank you.

##### Purchase this Solution

##### Solution Summary

The solution provides detailed explanation how to use substitution and elimination to solve linear equations.

##### Solution Preview

Methods of substitution:

-4x+9y=-71 (I)

3x-y=13 (II)

From (II), y=3x-13 (III), plug into (I):

-4x+9(3x-13)=-71.

x=2.

Plug x=2 into (III):

y=3*2-13=-7.

Therefore, the solution ...

##### Purchase this Solution

##### Free BrainMass Quizzes

##### Exponential Expressions

In this quiz, you will have a chance to practice basic terminology of exponential expressions and how to evaluate them.

##### Know Your Linear Equations

Each question is a choice-summary multiple choice question that will present you with a linear equation and then make 4 statements about that equation. You must determine which of the 4 statements are true (if any) in regards to the equation.

##### Multiplying Complex Numbers

This is a short quiz to check your understanding of multiplication of complex numbers in rectangular form.

##### Solving quadratic inequalities

This quiz test you on how well you are familiar with solving quadratic inequalities.

##### Probability Quiz

Some questions on probability