8u-6u-u-u+3u=15

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Solution for 8u-6u-u-u+3u=15 equation: 


Simplifying
8u + -6u + -1u + -1u + 3u = 15

Combine like terms: 8u + -6u = 2u
2u + -1u + -1u + 3u = 15

Combine like terms: 2u + -1u = 1u
1u + -1u + 3u = 15

Combine like terms: 1u + -1u = 0
0 + 3u = 15
3u = 15

Solving
3u = 15

Solving for variable 'u'.

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

Divide each side by '3'.
u = 5

Simplifying
u = 5

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