Question

Please isolate y and use the equation to get the following answers with x

Answer 1

1: Subtract x on both sides: 2y = 4 - x
2: divide both sides by 2: y = 2 - x/2

Answer 2

X + 2y = 4
2y = -x + 4
divide both sides by 2
y = (-1/2)x + 2 
y = (-1/2)(1) + 2 =   1 1/2
y = (-1/2)(2) + 2 =   1
y = (-1/2)(3) + 2 =   1/2
y = (-1/2)(4) + 2 = 0
y = (-1/2)(5) + 2 = - 1/2