To simplify the expression 4(3z-7), distribute the 4 to both terms inside the parentheses:
4(3z-7) = 4(3z) - 4(7)
Multiplying 4 by 3z, we get:
12z - 4(7)
Multiplying 4 by 7, we get:
12z - 28
So, the simplified expression is 12z - 28.
4(3z-7)
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