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25.8=0.4w+5
We move all terms to the left:
25.8-(0.4w+5)=0
We get rid of parentheses
-0.4w-5+25.8=0
We add all the numbers together, and all the variables
-0.4w+20.8=0
We move all terms containing w to the left, all other terms to the right
-0.4w=-20.8
w=-20.8/-0.4
w=+52
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