Answers

2015-08-19T21:33:29+08:00
1x + y = -1
Y= -3-2x

-y=1x+1
y=-2x-3

= -x -3(ge croshout c Y)
x= -3

Substitute x to 3 to a i equation
y= -3 - 2(-3)
y= -3 + 6
Y= 3

check
y= -3 - 2x
e substitute si x and y
so y = -3 -2x becomes 3=-3 -2(-3)
so 3 = -3 + 6
so 3=3

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