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5(10x-12.5)=20
We move all terms to the left:
5(10x-12.5)-(20)=0
We multiply parentheses
50x-62.5-20=0
We add all the numbers together, and all the variables
50x-82.5=0
We move all terms containing x to the left, all other terms to the right
50x=82.5
x=82.5/50
x=1+13/20
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