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1.4=-4w+7.8
We move all terms to the left:
1.4-(-4w+7.8)=0
We get rid of parentheses
4w-7.8+1.4=0
We add all the numbers together, and all the variables
4w-6.4=0
We move all terms containing w to the left, all other terms to the right
4w=6.4
w=6.4/4
w=1+1/1.6666666666667
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