SOLUTION: -3x-y=155 6x+7y=5 solve using substitution method

Algebra ->  Equations -> SOLUTION: -3x-y=155 6x+7y=5 solve using substitution method      Log On


   

Question 371084: -3x-y=155 6x+7y=5 solve using substitution method
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
1.-3x-y=155
2.+6x%2B7y=5
From eq. 1,
-3x=y%2B155
6x=-2y-310
Substitute into eq. 2,
-2y-310%2B7y=5
5y=315
highlight%28y=63%29
Then from eq. 1,
-3x-63=155
-3x=218
highlight%28x=-218%2F3%29