Question

2y - ( y-1) = 5 - ( y-3)

Answer 1

$2y - (y - 1) = 5 - (y - 3) \\ 2y - y + 1 = 5 - y + 3 \\ 2y - y + y = 5 + 3 - 1 \\ 2y = 7 \\ y = \frac{7}{2} = 3.5$

Answer 2

2y - y + 1 = 5 - y + 3
2y - y + y = 5 + 3 - 1
2y = 7
y = 7/2