How do you solve the system of equations #x+ y = -3# and #- 5x + y = 9#?

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Answer 1 · 2016-09-27T01:49:18

#y = -3 - x#

#y = -3 - x -> -5x + (-3 - x) = 9#

#-5x - 3 - x =9#

#-6x = 12#

#x = -2#

#x + y = -3#

#-2 + y = -3#

#y = -3 + 2#

#y = -1#

Hence, the solution set is #{-2, -1}#.

Hopefully this helps!