Question

Resolva : 3-z = 5z - 15

Answer 1

Bom dia! Tudo bem?

   3-z = 5z - 15
 3 + 15 = 5z + z
      18 = 6z
      z = 18/6
       z = 3

Bons estudos

Answer 2

3-z = 5z -15 ⇒ -z-5z = -15 - 3 ⇒6z = 18 ⇒ z = 18 ÷ 6 ⇒ z = 3