u-u+2u+u-2u=13

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Solution for u-u+2u+u-2u=13 equation: 


Simplifying
u + -1u + 2u + u + -2u = 13

Combine like terms: u + -1u = 0
0 + 2u + u + -2u = 13
2u + u + -2u = 13

Combine like terms: 2u + u = 3u
3u + -2u = 13

Combine like terms: 3u + -2u = 1u
1u = 13

Solving
1u = 13

Solving for variable 'u'.

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

Divide each side by '1'.
u = 13

Simplifying
u = 13

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