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13+w/7=-28
We move all terms to the left:
13+w/7-(-28)=0
We add all the numbers together, and all the variables
w/7+41=0
We multiply all the terms by the denominator
w+41*7=0
We add all the numbers together, and all the variables
w+287=0
We move all terms containing w to the left, all other terms to the right
w=-287
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