20+5u=85

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Solution for 20+5u=85 equation: 



20+5u=85

We move all terms to the left:

20+5u-(85)=0

We add all the numbers together, and all the variables

5u-65=0

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

5u=65

u=65/5

u=13

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