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12(x+3.50)=294
We move all terms to the left:
12(x+3.50)-(294)=0
We add all the numbers together, and all the variables
12(x+3.5)-294=0
We multiply parentheses
12x+42-294=0
We add all the numbers together, and all the variables
12x-252=0
We move all terms containing x to the left, all other terms to the right
12x=252
x=252/12
x=21
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