Question #82fd8

1 Answer
Feb 18, 2017

Answer:

#(x,y)=(-3,-13)#

Explanation:

Given
[1]#color(white)("XXX")color(blue)x+color(red)y=-16#
[2]#color(white)("XXX")color(red)y=color(red)(5x+2)#

Substituting for #color(red)y# from [2] into [1]
[3]#color(white)("XXX")color(blue)x+color(red)(5x+2)=-16#

[4]#color(white)("XXX")6x=-18#

[5]#color(white)("XXX")color(blue)x=color(blue)(-3)#

Substituting for #color(blue)x# in [1]
[6]#color(white)("XXX")color(blue)(-3)+color(red)y=-16#

[7]#color(white)("XXX")color(red)y =color(red)(-13)#