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x/7-10=-30
We move all terms to the left:
x/7-10-(-30)=0
We add all the numbers together, and all the variables
x/7+20=0
We multiply all the terms by the denominator
x+20*7=0
We add all the numbers together, and all the variables
x+140=0
We move all terms containing x to the left, all other terms to the right
x=-140
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