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12w+13w-7+1=-3w+1-7
We move all terms to the left:
12w+13w-7+1-(-3w+1-7)=0
We add all the numbers together, and all the variables
12w+13w-(-3w-6)-7+1=0
We add all the numbers together, and all the variables
25w-(-3w-6)-6=0
We get rid of parentheses
25w+3w+6-6=0
We add all the numbers together, and all the variables
28w=0
w=0/28
w=0
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