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w+w+(w+3)+(w+3)=30
We move all terms to the left:
w+w+(w+3)+(w+3)-(30)=0
We add all the numbers together, and all the variables
2w+(w+3)+(w+3)-30=0
We get rid of parentheses
2w+w+w+3+3-30=0
We add all the numbers together, and all the variables
4w-24=0
We move all terms containing w to the left, all other terms to the right
4w=24
w=24/4
w=6
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