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6(2w+3)=42
We move all terms to the left:
6(2w+3)-(42)=0
We multiply parentheses
12w+18-42=0
We add all the numbers together, and all the variables
12w-24=0
We move all terms containing w to the left, all other terms to the right
12w=24
w=24/12
w=2
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