Answer:
Step-by-step explanation:
(8z - 12) + (6z +90)
add common things
14z+78
this is as simplest at it will go
(8z - 12) + (6z +90)
pretend that there is a 1 in front of the second bracket
(8z - 12) +1 (6z +90)
mutiply the second bracket by 1
(1)(6z)= 6z
(1)(90)= 90
8z-12+6z+90
8z+6z-12+90
Answer: 14z+78
