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4.2=-8u+29.8
We move all terms to the left:
4.2-(-8u+29.8)=0
We get rid of parentheses
8u-29.8+4.2=0
We add all the numbers together, and all the variables
8u-25.6=0
We move all terms containing u to the left, all other terms to the right
8u=25.6
u=25.6/8
u=3+1/5
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