How do you solve x+y= -3 and y= x+3?

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Answer 1 · 2015-10-01T07:47:36

The solution is
#color(blue)(x=-3,y=0#

#x+y= -3 #.....equation #1#
#y= color(blue)(x+3#............equation #2#

Solving by substitution .

Substituting equation #2# in #1#

#x+y= -3 #
#x+color(blue)(x+3= -3 #

#2x+3= -3 #

#2x= -3-3 #

#2x= -6 #

#x= -6/2 #

#color(blue)(x=-3#

Finding #y# by substituting #x# in equation #2#
#y=x+3#

#y=-3+3#

#color(blue)(y=0#