28=8u-u

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Solution for 28=8u-u equation:


Simplifying
28 = 8u + -1u

Combine like terms: 8u + -1u = 7u
28 = 7u

Solving
28 = 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.
28 + -7u = 7u + -7u

Combine like terms: 7u + -7u = 0
28 + -7u = 0

Add '-28' to each side of the equation.
28 + -28 + -7u = 0 + -28

Combine like terms: 28 + -28 = 0
0 + -7u = 0 + -28
-7u = 0 + -28

Combine like terms: 0 + -28 = -28
-7u = -28

Divide each side by '-7'.
u = 4

Simplifying
u = 4

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