12u-9u+2u+u-5u=15

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Solution for 12u-9u+2u+u-5u=15 equation: 


Simplifying
12u + -9u + 2u + u + -5u = 15

Combine like terms: 12u + -9u = 3u
3u + 2u + u + -5u = 15

Combine like terms: 3u + 2u = 5u
5u + u + -5u = 15

Combine like terms: 5u + u = 6u
6u + -5u = 15

Combine like terms: 6u + -5u = 1u
1u = 15

Solving
1u = 15

Solving for variable 'u'.

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

Divide each side by '1'.
u = 15

Simplifying
u = 15

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