3u-5=-u+8+7

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Solution for 3u-5=-u+8+7 equation: 



3u-5=-u+8+7

We move all terms to the left:

3u-5-(-u+8+7)=0

We add all the numbers together, and all the variables

3u-(-1u+15)-5=0

We get rid of parentheses

3u+1u-15-5=0

We add all the numbers together, and all the variables

4u-20=0

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

4u=20

u=20/4

u=5

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