Question

12.) 3 (5z - 7) +2 (9z-11) = 4 (8z - 7) - 111​

Answer 1

Answer:

$3(5z - 7) + 2(9z - 11) =4(8z - 7) - 11 \\ \\ = 15z - 21 + 18z - 22 = 32z - 44 \\ \\ = 33z - 43 = 32z - 44 \\ \\ = 33z - 32z = - 44 + 43 \\ \\ = 1z = - 1 \\ \\ z = - 1$

Answer 2

Answer:

$z = - 96$

Step-by-step explanation:

$3(5z - 7) + 2(9z - 11) = 4(8z - 7) - 111$

$= 15z - 21 + 18z - 22 = 32z - 28 - 111$

$= 33z - 43 = 32z - 139$

$z = - 96$