Question

Solve the following system of equations for y:

2x+y=12
-2x+3y=-4

a)8
b)2
c)3
d)4

Answer 1

Add the first equation to the second one, you get \(4y=8\) implies that \(y=2\).

Answer 2

add first equation to the second:
4y=8
solve for y: y=8/4=2
now, substitute value of y in any given equation:
2x+2=12
2x=10
x=5
so, your answer: (5,2)...
Actually, you need ONLY value of y = 2