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2(w+8.4)+2w=92.8
We move all terms to the left:
2(w+8.4)+2w-(92.8)=0
We add all the numbers together, and all the variables
2w+2(w+8.4)-92.8=0
We multiply parentheses
2w+2w+16.8-92.8=0
We add all the numbers together, and all the variables
4w-76=0
We move all terms containing w to the left, all other terms to the right
4w=76
w=76/4
w=19
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