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-21/4=2w
We move all terms to the left:
-21/4-(2w)=0
We multiply all the terms by the denominator
-2w*4-21=0
Wy multiply elements
-8w-21=0
We move all terms containing w to the left, all other terms to the right
-8w=21
w=21/-8
w=-2+5/8
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