Solve the system of equations by the substitution method.?

0 ⤊

{-7y = x + 44
{2x + 6y = -32

a. (5, -7)
b. (-5, -6)
c. (4, -6)
d. no solution

2007-12-03 08:57:15 · 2 answers · asked by . 1 in Science & Mathematics ➔ Mathematics

-7y-44=x
2x+6y=-32

2(-7y-44)+6y=-32
-14y-88+6y=-32
-8y-88+88=-32+88
-8y=56
y=-7
-7(-7)=x+44
49=x+44
5=x a.

2007-12-03 09:04:10 · answer #1 · answered by Dave aka Spider Monkey 7 · 0⤊ 0⤋

x+3y=-16
x=-16-3y
so
-7y= -16-3y+44
-4y=28
y= -7
49-44=x
5=x
so the answer is a.

2007-12-03 09:07:51 · answer #2 · answered by Anonymous · 0⤊ 0⤋