SOLUTION: I having a lot of trouble figuring out how to do this problem, + solve the system of equations by using the substitution method. x + 2y = -12 x= -5y

Question 462067: I having a lot of trouble figuring out how to do this problem,
+ solve the system of equations by using the substitution method.
x + 2y = -12
x= -5y
Answer by algebrahouse.com(1659) (Show Source): You can put this solution on YOUR website!
x + 2y = -12
x = -5y

x + 2y = -12 {top equation}
-5y + 2y = -12 {substituted -5y, in for x, into the top equation}
-3y = -12 {combined like terms}
y = 4 {divided both sides by -3}

x = -5y {original bottom equation}
x = -5(4) {substituted 4, in for y, into x = -5y}
x = -20 {multiplied}

x = -20 and y = 4
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