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12w+15w-9+5=-3w+5+9
We move all terms to the left:
12w+15w-9+5-(-3w+5+9)=0
We add all the numbers together, and all the variables
12w+15w-(-3w+14)-9+5=0
We add all the numbers together, and all the variables
27w-(-3w+14)-4=0
We get rid of parentheses
27w+3w-14-4=0
We add all the numbers together, and all the variables
30w-18=0
We move all terms containing w to the left, all other terms to the right
30w=18
w=18/30
w=3/5
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