18=7u-u

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Solution for 18=7u-u equation:


Simplifying
18 = 7u + -1u

Combine like terms: 7u + -1u = 6u
18 = 6u

Solving
18 = 6u

Solving for variable 'u'.

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

Add '-6u' to each side of the equation.
18 + -6u = 6u + -6u

Combine like terms: 6u + -6u = 0
18 + -6u = 0

Add '-18' to each side of the equation.
18 + -18 + -6u = 0 + -18

Combine like terms: 18 + -18 = 0
0 + -6u = 0 + -18
-6u = 0 + -18

Combine like terms: 0 + -18 = -18
-6u = -18

Divide each side by '-6'.
u = 3

Simplifying
u = 3

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