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3w+7w+4+7=7w+5w+7
We move all terms to the left:
3w+7w+4+7-(7w+5w+7)=0
We add all the numbers together, and all the variables
3w+7w-(12w+7)+4+7=0
We add all the numbers together, and all the variables
10w-(12w+7)+11=0
We get rid of parentheses
10w-12w-7+11=0
We add all the numbers together, and all the variables
-2w+4=0
We move all terms containing w to the left, all other terms to the right
-2w=-4
w=-4/-2
w=+2
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