Question

Please help me and show work for both answers

Answer 1

1. 3x - y = 4
-3x -y = 4
-y = 4 - 3x
y = -4 + 3x

2. x + 2y = 5
-x + 2y = 5
2y = 5 - x
— ——
2 = 2
5-x
y = ———
2

Answer 2

1) y = -4 + 3x

2) y = (5/2) - (x/2)

Explanation:

1) 3x - y = 4

-y = 4 - 3x

-1 * -y = -1 * 4 - 3x * -1 ( multiply each term by -1)

y = -4 + 3x

2) x + 2y = 5

2y = 5 - x

y = (5-x)/2

y = (5/2) - (x/2)