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15.00+7.00x=100
We move all terms to the left:
15.00+7.00x-(100)=0
We add all the numbers together, and all the variables
7.00x-85=0
We move all terms containing x to the left, all other terms to the right
7.00x=85
x=85/7.00
x=12+1/7.00
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