4=7-u

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Solution for 4=7-u equation:


Simplifying
4 = 7 + -1u

Solving
4 = 7 + -1u

Solving for variable 'u'.

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

Add 'u' to each side of the equation.
4 + u = 7 + -1u + u

Combine like terms: -1u + u = 0
4 + u = 7 + 0
4 + u = 7

Add '-4' to each side of the equation.
4 + -4 + u = 7 + -4

Combine like terms: 4 + -4 = 0
0 + u = 7 + -4
u = 7 + -4

Combine like terms: 7 + -4 = 3
u = 3

Simplifying
u = 3

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