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38=7(a-504)
We move all terms to the left:
38-(7(a-504))=0
We calculate terms in parentheses: -(7(a-504)), so:We get rid of parentheses
7(a-504)
We multiply parentheses
7a-3528
Back to the equation:
-(7a-3528)
-7a+3528+38=0
We add all the numbers together, and all the variables
-7a+3566=0
We move all terms containing a to the left, all other terms to the right
-7a=-3566
a=-3566/-7
a=509+3/7
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