SOLUTION: Solve by the substitution method.   x - 7y = 28 -6x - 6y = 24

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Question 932532: Solve by the substitution method.
  x - 7y = 28
-6x - 6y = 24
Answer by jack.wang5(5) About Me  (Show Source):
You can put this solution on YOUR website!
x - 28 = 7y , so y = x/7 - 4.
- 6x - 6y = 24 , so -6( x + y )=24, x + y = -4 = x + (x/7-4)=-4, x = 0.
y = -4.