Question

passo a passo para resolver esta equação 3 - z=5z -15

Answer 1

$3 - z=5z -15\to \\\\ -z-5z=-15-3\to \\\\ -6z=-18~(-1)\to \\\\ 6z=18\to \\\\ z= \frac{18}{6} \\\\ \boxed{z=3}$

Answer 2

3-z=5z-15
-z-5z=-15-3
-6z=(-18) . (-1)
6z=18
z= 18 sobre 6
z= 3