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5(10x-12.2)=20
We move all terms to the left:
5(10x-12.2)-(20)=0
We multiply parentheses
50x-61-20=0
We add all the numbers together, and all the variables
50x-81=0
We move all terms containing x to the left, all other terms to the right
50x=81
x=81/50
x=1+31/50
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