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X=17.50-3X
We move all terms to the left:
X-(17.50-3X)=0
We add all the numbers together, and all the variables
X-(-3X+17.5)=0
We get rid of parentheses
X+3X-17.5=0
We add all the numbers together, and all the variables
4X-17.5=0
We move all terms containing X to the left, all other terms to the right
4X=17.5
X=17.5/4
X=4+1/2.6666666666667
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