u+2u+1=10

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Solution for u+2u+1=10 equation: 


Simplifying
u + 2u + 1 = 10

Reorder the terms:
1 + u + 2u = 10

Combine like terms: u + 2u = 3u
1 + 3u = 10

Solving
1 + 3u = 10

Solving for variable 'u'.

Move all terms containing u to the left, all other terms to the right.

Add '-1' to each side of the equation.
1 + -1 + 3u = 10 + -1

Combine like terms: 1 + -1 = 0
0 + 3u = 10 + -1
3u = 10 + -1

Combine like terms: 10 + -1 = 9
3u = 9

Divide each side by '3'.
u = 3

Simplifying
u = 3

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