3u+42=8u-3

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Solution for 3u+42=8u-3 equation: 



3u+42=8u-3

We move all terms to the left:

3u+42-(8u-3)=0

We get rid of parentheses

3u-8u+3+42=0

We add all the numbers together, and all the variables

-5u+45=0

We move all terms containing u to the left, all other terms to the right

-5u=-45

u=-45/-5

u=+9

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