(u+2)7=21

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Solution for (u+2)7=21 equation:


Simplifying
(u + 2) * 7 = 21

Reorder the terms:
(2 + u) * 7 = 21

Reorder the terms for easier multiplication:
7(2 + u) = 21
(2 * 7 + u * 7) = 21
(14 + 7u) = 21

Solving
14 + 7u = 21

Solving for variable 'u'.

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

Add '-14' to each side of the equation.
14 + -14 + 7u = 21 + -14

Combine like terms: 14 + -14 = 0
0 + 7u = 21 + -14
7u = 21 + -14

Combine like terms: 21 + -14 = 7
7u = 7

Divide each side by '7'.
u = 1

Simplifying
u = 1

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