Question 419619: I need help solving this problem, it involves solving systems of equations by substitution, it is y = -2
4x - 3 y = 18 Please help solve this, Thank you.
Answer by algebrahouse.com(1659)   (Show Source):
You can put this solution on YOUR website! "I need help solving this problem, it involves solving systems of equations by substitution, it is y = -2
4x - 3 y = 18 Please help solve this, Thank you."
y = -2
4x - 3y = 18
4x - 3(-2) = 18 {substituted -2, in for y, into bottom equation}
4x + 6 = 18 {multiplied -3 by -2}
4x = 12 {subtracted 6 from both sides}
x = 3 {divided both sides by 4}
x = 3 and y = -2
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