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3x-81+x/2=360
We move all terms to the left:
3x-81+x/2-(360)=0
We add all the numbers together, and all the variables
3x+x/2-441=0
We multiply all the terms by the denominator
3x*2+x-441*2=0
We add all the numbers together, and all the variables
x+3x*2-882=0
Wy multiply elements
x+6x-882=0
We add all the numbers together, and all the variables
7x-882=0
We move all terms containing x to the left, all other terms to the right
7x=882
x=882/7
x=126
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