SOLUTION: y=2x 3x+3y=-18 Y=? X=? Solve for X and Y using substitution

Question 846293: y=2x
3x+3y=-18
Y=?
X=?
Solve for X and Y using substitution

Answer by dg181625(2) (Show Source): You can put this solution on YOUR website!
y=2x
3x+3y=-18
Y=?
X=?

Since y is already isolated, just plug it in the second equation to find x.
3(x) + 3(2x) = -18
3x + 6x = -18
9x = -18
x = -2
X is equal to -2. So just plug and chug in order to find y.
y = 2(x)
y = 2(-2)
y = -4
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