Question

1: 3x-4=5x=6
2: 2h+8=5h-7
3: 3x-5=2x+6
plz help

Answer 1

I'll do one. The others work the same way.
3x-5=2x+6
add 5 to both sides:
3x = 2x+11
subtract 2x from both sides:
x = 11

Answer 2

If you are solving for the variables. Take the letters to one side and the numbers to the other.
3.
3x - 5 = 2x + 6
remember that you need the opposite operation to move across the equal sign...
3x - 5 +5 = 2x + 6 + 5 and whatever you do to one side you have to do to the other side
3x = 2x + 11 now take 2x away from both sides
3x - 2x = 2x + 11 - 2x
1x = 11
and you are done #3. You try the others : )