3u-40=23

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Solution for 3u-40=23 equation: 


Simplifying
3u + -40 = 23

Reorder the terms:
-40 + 3u = 23

Solving
-40 + 3u = 23

Solving for variable 'u'.

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

Add '40' to each side of the equation.
-40 + 40 + 3u = 23 + 40

Combine like terms: -40 + 40 = 0
0 + 3u = 23 + 40
3u = 23 + 40

Combine like terms: 23 + 40 = 63
3u = 63

Divide each side by '3'.
u = 21

Simplifying
u = 21

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