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x+x*2+x/2=91
We move all terms to the left:
x+x*2+x/2-(91)=0
Wy multiply elements
x+2x+x/2-91=0
We multiply all the terms by the denominator
x*2+2x*2+x-91*2=0
We add all the numbers together, and all the variables
x+x*2+2x*2-182=0
Wy multiply elements
x+2x+4x-182=0
We add all the numbers together, and all the variables
7x-182=0
We move all terms containing x to the left, all other terms to the right
7x=182
x=182/7
x=26
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