How do you solve the system of equations #3x-4y=-24# and #x+y=-1#?

1 Answer
Jiyoun Seo · Stefan V.
Apr 30, 2016

#x=-4, y=3#

Explanation:

#3x-4y=-24#

#x+y=-1#

If you multiply the 2nd equation by #4#, you get

#3x-4y=-24#

#4x+4y=-4#

If you add up those two, you get

#7x=-28 implies x=-4#

If you put #x=-4# into one of the equations, you get

#-4 + y = -1 implies y=3#

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