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x+2x+x/2+15=99
We move all terms to the left:
x+2x+x/2+15-(99)=0
We add all the numbers together, and all the variables
3x+x/2-84=0
We multiply all the terms by the denominator
3x*2+x-84*2=0
We add all the numbers together, and all the variables
x+3x*2-168=0
Wy multiply elements
x+6x-168=0
We add all the numbers together, and all the variables
7x-168=0
We move all terms containing x to the left, all other terms to the right
7x=168
x=168/7
x=24
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