h = 3.
FIRST STEP:
Add 1 to both sides to get rid of the -1 on the left side.
4h-1 = 3h+2
4h-1 (+1) = 3h+2 (+1)
4h = 3h+3
SECOND (FINAL) STEP:
Subtract 3h from both sides to get rid of the 3h on the right side.
4h(-3h) = 3h+3 (-3h)
h = 3
Hope this helps, sorry if it's hard to understand :)