How do you solve the system of equations #9x - 7y = - 8# and # - 10x - 13y = - 10#?

1 Answer
Daniel T.
Feb 9, 2018

#{9x-7y=-8 | *10 and {-10x-13y=-10 | *9 =>90x-70y=-80 and -90x-117y=-90# Now by gathering both ecuation we obtain: #-187y=-90 =>y=170/187 and x=-34/178#

Explanation:

Multiply first ecuation with 10 and the second one with 9

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