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:


has solution

or



(x=10.8, y=7.2}
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