What is the solution to the system of equations #x = y - 1# and #2x + y = -2#?

1 Answer
Özgür Özer
Dec 28, 2015

#x=-1# and #y=0#

Explanation:

#color(white)(xx)x=y-1#, #2x+y=-2#

#color(white)xx2x+y=-2<=>x=(-y-2)/2#

#=>y-1=(-y-2)/2#
#=>color(red)(2xx)(y-1)=color(red)(2xx)(-y-2)/2#
#=>2y-2color(red)(+2)=-y-2color(red)(+2)#
#=>y=0#

#color(white)(xx)x=y-1#
#color(white)(xxx)=color(blue)0-1#
#color(white)(xxx)=-1#

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