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x+x-4+x/5=84
We move all terms to the left:
x+x-4+x/5-(84)=0
We add all the numbers together, and all the variables
2x+x/5-88=0
We multiply all the terms by the denominator
2x*5+x-88*5=0
We add all the numbers together, and all the variables
x+2x*5-440=0
Wy multiply elements
x+10x-440=0
We add all the numbers together, and all the variables
11x-440=0
We move all terms containing x to the left, all other terms to the right
11x=440
x=440/11
x=40
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