Question

15z-3-9z=0
me ajudem pfvv

Answer 1

15z-9z= 3
6z=3
z=3/6 (simplifica por 3)
z= 1/2

Answer 2

15z - 3 - 9z = 0
6z - 3 = 0
6z = 3
z = 3 (:3) =  1
      6 (:3)     2

R.: z = 1/2