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15/2=-5w
We move all terms to the left:
15/2-(-5w)=0
We get rid of parentheses
5w+15/2=0
We multiply all the terms by the denominator
5w*2+15=0
Wy multiply elements
10w+15=0
We move all terms containing w to the left, all other terms to the right
10w=-15
w=-15/10
w=-1+1/2
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