Respuesta :

TbBr
h= -1/43

4h+12=11-39h
4h+39= -12+11 or 11-12
43h= -1
h= -1/43
4h + 12 = 11 - 39h
-4h                 -4h

12 = 11 - 43h
        - 11

12 - 11 = 1

1 = -43h
h = -1/43

Now we have our answer, and value for h 
h = - 1/43