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-4x/7-3=-15
We move all terms to the left:
-4x/7-3-(-15)=0
We add all the numbers together, and all the variables
-4x/7+12=0
We multiply all the terms by the denominator
-4x+12*7=0
We add all the numbers together, and all the variables
-4x+84=0
We move all terms containing x to the left, all other terms to the right
-4x=-84
x=-84/-4
x=+21
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