SOLUTION: Solve by substitution. 3x+7y=33 x=15-3y

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Question 251419: Solve by substitution.
3x+7y=33
x=15-3y
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
3x+7y=33
x=15-3y replace x in the first equation with(14-3y) & solve for y.
3(15-3y)+7y=33
45-9y+7y=33
-2y=33-45
-2y=-12
y=-12/-2
y=6 ans.
x=15-3*6
x=15-18
x=-3 ans.
Proof:
3*-3+7*6=33
-9+42=33
33=33