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8(a-5)=140
We move all terms to the left:
8(a-5)-(140)=0
We multiply parentheses
8a-40-140=0
We add all the numbers together, and all the variables
8a-180=0
We move all terms containing a to the left, all other terms to the right
8a=180
a=180/8
a=22+1/2
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