Answer:
9z+15
Explanation:
-3(-6z-5)-9z
You multiply 3 by the numbers in the *( ) and get
18z+15-9z
Then you add any number with the same variable.
18z with -9z is 9z because different signs means subtract and same signs mean to add.
Then this should be your results.
9z+15
P.S Just in case use GOOGLE or the calculator to double check.
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