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21x/2=180
We move all terms to the left:
21x/2-(180)=0
We multiply all the terms by the denominator
21x-180*2=0
We add all the numbers together, and all the variables
21x-360=0
We move all terms containing x to the left, all other terms to the right
21x=360
x=360/21
x=17+1/7
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