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5w+4.2=8.3
We move all terms to the left:
5w+4.2-(8.3)=0
We add all the numbers together, and all the variables
5w-4.1=0
We move all terms containing w to the left, all other terms to the right
5w=4.1
w=4.1/5
w=3.7272727272727/4.5454545454545
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