Respuesta :

5h-7=2h+2
3h-7=2
3h=9
h=3
5h-7=2(h+1)

5h-7=2h+2

5h-7 +7 =2h+2 +7

5h-2h=2h+9 -2h

3h=9

h=3

it is just moving terms onto the other side, and cancelling them out. let me know if you need me to explain more! :)