Question B.)
1.5w + 3 -3 = 3 + 2w -3
1.5w = 2w
If you plug in 0 into w...
1.5 * 0 = 2 * 0
Therefore w = 0
Question C.) 48 + 8x + 23 = 7
71 + 8x = 7
71 + 8x -71 = 7 - 71
8x = -64
x = -64 / 8
x = -8
Question d.)
6x - 21 = 5x + 17 + x
6x - 21 - 6x = 5x + 17 + x - 6x
-21 = 17
IMPOSSIBLE so x = ns