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3.5(x+3)=35
We move all terms to the left:
3.5(x+3)-(35)=0
We multiply parentheses
3.5x+10.5-35=0
We add all the numbers together, and all the variables
3.5x-24.5=0
We move all terms containing x to the left, all other terms to the right
3.5x=24.5
x=24.5/3.5
x=7
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