10u-21=39

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Solution for 10u-21=39 equation: 


Simplifying
10u + -21 = 39

Reorder the terms:
-21 + 10u = 39

Solving
-21 + 10u = 39

Solving for variable 'u'.

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

Add '21' to each side of the equation.
-21 + 21 + 10u = 39 + 21

Combine like terms: -21 + 21 = 0
0 + 10u = 39 + 21
10u = 39 + 21

Combine like terms: 39 + 21 = 60
10u = 60

Divide each side by '10'.
u = 6

Simplifying
u = 6

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