(u+5)*9=81

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Solution for (u+5)*9=81 equation:


Simplifying
(u + 5) * 9 = 81

Reorder the terms:
(5 + u) * 9 = 81

Reorder the terms for easier multiplication:
9(5 + u) = 81
(5 * 9 + u * 9) = 81
(45 + 9u) = 81

Solving
45 + 9u = 81

Solving for variable 'u'.

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

Add '-45' to each side of the equation.
45 + -45 + 9u = 81 + -45

Combine like terms: 45 + -45 = 0
0 + 9u = 81 + -45
9u = 81 + -45

Combine like terms: 81 + -45 = 36
9u = 36

Divide each side by '9'.
u = 4

Simplifying
u = 4

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