(u-9)*7=42

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Solution for (u-9)*7=42 equation:


Simplifying
(u + -9) * 7 = 42

Reorder the terms:
(-9 + u) * 7 = 42

Reorder the terms for easier multiplication:
7(-9 + u) = 42
(-9 * 7 + u * 7) = 42
(-63 + 7u) = 42

Solving
-63 + 7u = 42

Solving for variable 'u'.

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

Add '63' to each side of the equation.
-63 + 63 + 7u = 42 + 63

Combine like terms: -63 + 63 = 0
0 + 7u = 42 + 63
7u = 42 + 63

Combine like terms: 42 + 63 = 105
7u = 105

Divide each side by '7'.
u = 15

Simplifying
u = 15

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