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-18+x/4=-30
We move all terms to the left:
-18+x/4-(-30)=0
We add all the numbers together, and all the variables
x/4+12=0
We multiply all the terms by the denominator
x+12*4=0
We add all the numbers together, and all the variables
x+48=0
We move all terms containing x to the left, all other terms to the right
x=-48
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