10u+9=7u

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Solution for 10u+9=7u equation:


Simplifying
10u + 9 = 7u

Reorder the terms:
9 + 10u = 7u

Solving
9 + 10u = 7u

Solving for variable 'u'.

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

Add '-7u' to each side of the equation.
9 + 10u + -7u = 7u + -7u

Combine like terms: 10u + -7u = 3u
9 + 3u = 7u + -7u

Combine like terms: 7u + -7u = 0
9 + 3u = 0

Add '-9' to each side of the equation.
9 + -9 + 3u = 0 + -9

Combine like terms: 9 + -9 = 0
0 + 3u = 0 + -9
3u = 0 + -9

Combine like terms: 0 + -9 = -9
3u = -9

Divide each side by '3'.
u = -3

Simplifying
u = -3

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