SOLUTION: Solve using the substitution method 3x+7y=-33 2x-y=12

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Question 1102999: Solve using the substitution method
3x+7y=-33
2x-y=12
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
1.3x%2B7y=-33
2.2x-y=12
From eq. 2,
2x=12%2By
Multiplying by 3,
3.6x=36%2B3y
I'll call this equation 3.
Multiplying eq. 1 by 2 you get,
6x%2B14y=-66
Substituting from eq. 3,
36%2B3y%2B14y=-66
17y=-102
Solve for y and then use any of the equations to solve for x.