22-7=u

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Solution for 22-7=u equation:


Simplifying
22 + -7 = u

Combine like terms: 22 + -7 = 15
15 = u

Solving
15 = u

Solving for variable 'u'.

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

Add '-1u' to each side of the equation.
15 + -1u = u + -1u

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

Add '-15' to each side of the equation.
15 + -15 + -1u = 0 + -15

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

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

Divide each side by '-1'.
u = 15

Simplifying
u = 15

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