7(u-86)=21

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Solution for 7(u-86)=21 equation:


Simplifying
7(u + -86) = 21

Reorder the terms:
7(-86 + u) = 21
(-86 * 7 + u * 7) = 21
(-602 + 7u) = 21

Solving
-602 + 7u = 21

Solving for variable 'u'.

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

Add '602' to each side of the equation.
-602 + 602 + 7u = 21 + 602

Combine like terms: -602 + 602 = 0
0 + 7u = 21 + 602
7u = 21 + 602

Combine like terms: 21 + 602 = 623
7u = 623

Divide each side by '7'.
u = 89

Simplifying
u = 89

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