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7(a-7)+24=2(a-5)
We move all terms to the left:
7(a-7)+24-(2(a-5))=0
We multiply parentheses
7a-(2(a-5))-49+24=0
We calculate terms in parentheses: -(2(a-5)), so:We add all the numbers together, and all the variables
2(a-5)
We multiply parentheses
2a-10
Back to the equation:
-(2a-10)
7a-(2a-10)-25=0
We get rid of parentheses
7a-2a+10-25=0
We add all the numbers together, and all the variables
5a-15=0
We move all terms containing a to the left, all other terms to the right
5a=15
a=15/5
a=3
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