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-15/7=3w
We move all terms to the left:
-15/7-(3w)=0
We multiply all the terms by the denominator
-3w*7-15=0
Wy multiply elements
-21w-15=0
We move all terms containing w to the left, all other terms to the right
-21w=15
w=15/-21
w=-5/7
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