Answer:
A = 6.
Explanation:
4(3a-4)=56
distribute
12a-16=56
add 16
12a = 72
divide by 12
a = 6
A = 6
4(3A - 4) = 56 (Distribute/multiply the 4 to everything inside the parentheses)
12A - 16 = 56 (Add 16 to both sides to get A on one side)
12A = 72 (Divide both sides by 12 to get A by itself)
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