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12.4w+3.9=-4.6w-6.3
We move all terms to the left:
12.4w+3.9-(-4.6w-6.3)=0
We get rid of parentheses
12.4w+4.6w+6.3+3.9=0
We add all the numbers together, and all the variables
17w+10.2=0
We move all terms containing w to the left, all other terms to the right
17w=-10.2
w=-10.2/17
w=-8.5/14.166666666667
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