5u-21u=-20

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Solution for 5u-21u=-20 equation: 


Simplifying
5u + -21u = -20

Combine like terms: 5u + -21u = -16u
-16u = -20

Solving
-16u = -20

Solving for variable 'u'.

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

Divide each side by '-16'.
u = 1.25

Simplifying
u = 1.25

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