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12.99x=50.5
We move all terms to the left:
12.99x-(50.5)=0
We add all the numbers together, and all the variables
12.99x-50.5=0
We move all terms containing x to the left, all other terms to the right
12.99x=50.5
x=50.5/12.99
x=3+7.5359477124183/8.4901960784314
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