(u-3)x*7=42

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Solution for (u-3)x*7=42 equation: 


Simplifying
(u + -3) * x * 7 = 42

Reorder the terms:
(-3 + u) * x * 7 = 42

Reorder the terms for easier multiplication:
7x(-3 + u) = 42
(-3 * 7x + u * 7x) = 42

Reorder the terms:
(7ux + -21x) = 42
(7ux + -21x) = 42

Solving
7ux + -21x = 42

Solving for variable 'u'.

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

Add '21x' to each side of the equation.
7ux + -21x + 21x = 42 + 21x

Combine like terms: -21x + 21x = 0
7ux + 0 = 42 + 21x
7ux = 42 + 21x

Divide each side by '7x'.
u = 6x-1 + 3

Simplifying
u = 6x-1 + 3

Reorder the terms:
u = 3 + 6x-1

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