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-4.5=-0.5(a-7.1)
We move all terms to the left:
-4.5-(-0.5(a-7.1))=0
We calculate terms in parentheses: -(-0.5(a-7.1)), so:We get rid of parentheses
-0.5(a-7.1)
We multiply parentheses
-0.5a+3.55
Back to the equation:
-(-0.5a+3.55)
0.5a-3.55-4.5=0
We add all the numbers together, and all the variables
0.5a-8.05=0
We move all terms containing a to the left, all other terms to the right
0.5a=8.05
a=8.05/0.5
a=16+0.050000000000001/0.5
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