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12.25+3.99x=77.49
We move all terms to the left:
12.25+3.99x-(77.49)=0
We add all the numbers together, and all the variables
3.99x-65.24=0
We move all terms containing x to the left, all other terms to the right
3.99x=65.24
x=65.24/3.99
x=16+1/2.85
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