Question

POR FAVOR AYUDAME ES PARA MAÑANA

1. 3(z-1)-4(5-z)=2(6+z)

Answer 1

3(z-1) - 4(5-z) = 2 (6+z)
(3z - 3) - (20 -4z) = (12+2z)
3z -3 -20 + 4z = 12 + 2z
-23 +7z = 12+ 2z
7z - 2z = 12 +23
5z = 35
z= 35/5
z= 7

comprobamos

3 (7-1) -4(5-7) = 2(6+7)
3 x 6 - 4 x -2 = 2 x 13
18 +8 = 26
26=26

Saludos :)