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7w+3(4w-1)=-79
We move all terms to the left:
7w+3(4w-1)-(-79)=0
We add all the numbers together, and all the variables
7w+3(4w-1)+79=0
We multiply parentheses
7w+12w-3+79=0
We add all the numbers together, and all the variables
19w+76=0
We move all terms containing w to the left, all other terms to the right
19w=-76
w=-76/19
w=-4
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