Question

2.(3-y)+7.(2-y)=15-4 y
3.(x-2)-(1-x)=13
x-(x+1)=12-(3 x-2)

Answer 1

2.(3-y) + 7.(2-y) = 15 - 4y
6-2y + 14 - 7y = 15 -4y
20 - 15 = -4y + 2y + 7y
5 = 5y
y = 1

3.(x-2) - (1-x) = 13
3x - 6 -1 + x = 13
4x = 13 + 6 + 1
4x = 20
x = 5

x - (x+1) = 12 - (3x-2)
x - x - 1 = 12 -3x + 2
3x = 12 + 2 + 1
3x = 15
x = 5