2u+19+u+45=7u-21

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Solution for 2u+19+u+45=7u-21 equation: 



2u+19+u+45=7u-21

We move all terms to the left:

2u+19+u+45-(7u-21)=0

We add all the numbers together, and all the variables

3u-(7u-21)+64=0

We get rid of parentheses

3u-7u+21+64=0

We add all the numbers together, and all the variables

-4u+85=0

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

-4u=-85

u=-85/-4

u=21+1/4

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