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x+x/2+4=13
We move all terms to the left:
x+x/2+4-(13)=0
We add all the numbers together, and all the variables
x+x/2-9=0
We multiply all the terms by the denominator
x*2+x-9*2=0
We add all the numbers together, and all the variables
x+x*2-18=0
Wy multiply elements
x+2x-18=0
We add all the numbers together, and all the variables
3x-18=0
We move all terms containing x to the left, all other terms to the right
3x=18
x=18/3
x=6
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