SOLUTION: Solve the system of equations by the addition method..All I have. x-4y=-18 -6x+4y=-36

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Question 34727This question is from textbook Prealgebra & Introductory Algebra
: Solve the system of equations by the addition method..All I have.

x-4y=-18
-6x+4y=-36 This question is from textbook Prealgebra & Introductory Algebra

Found 2 solutions by hydromojo, ichudov:
Answer by hydromojo(20) (Show Source):
You can put this solution on YOUR website!
Just add the 2 equations, that way you get rid of the 'y' term
you get
so, x = 10.8
use this value of x in either equation, say in eqn#1, so

so, -4y = -28.8 and y = 7.2

Answer by ichudov(507) (Show Source):
You can put this solution on YOUR website!

Solved by pluggable solver: Linear System solver (using determinant)

Solve:

Any system of equations:

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or

(x=10.8, y=7.2}