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x/2+x=84
We move all terms to the left:
x/2+x-(84)=0
We add all the numbers together, and all the variables
x+x/2-84=0
We multiply all the terms by the denominator
x*2+x-84*2=0
We add all the numbers together, and all the variables
x+x*2-168=0
Wy multiply elements
x+2x-168=0
We add all the numbers together, and all the variables
3x-168=0
We move all terms containing x to the left, all other terms to the right
3x=168
x=168/3
x=56
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