# Use Substitution and Elimination to Solve the Linear Equation.

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.

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#### 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 ...

#### Solution Summary

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

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