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4(a-0.5)=7
We move all terms to the left:
4(a-0.5)-(7)=0
We multiply parentheses
4a-2-7=0
We add all the numbers together, and all the variables
4a-9=0
We move all terms containing a to the left, all other terms to the right
4a=9
a=9/4
a=2+1/4
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