3u+25=7u-7

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Solution for 3u+25=7u-7 equation: 



3u+25=7u-7

We move all terms to the left:

3u+25-(7u-7)=0

We get rid of parentheses

3u-7u+7+25=0

We add all the numbers together, and all the variables

-4u+32=0

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

-4u=-32

u=-32/-4

u=+8

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