509=49+23u

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Solution for 509=49+23u equation: 



509=49+23u

We move all terms to the left:

509-(49+23u)=0

We add all the numbers together, and all the variables

-(23u+49)+509=0

We get rid of parentheses

-23u-49+509=0

We add all the numbers together, and all the variables

-23u+460=0

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

-23u=-460

u=-460/-23

u=+20

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