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5w+10=21-2w
We move all terms to the left:
5w+10-(21-2w)=0
We add all the numbers together, and all the variables
5w-(-2w+21)+10=0
We get rid of parentheses
5w+2w-21+10=0
We add all the numbers together, and all the variables
7w-11=0
We move all terms containing w to the left, all other terms to the right
7w=11
w=11/7
w=1+4/7
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