21=4u-11

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Solution for 21=4u-11 equation:


Simplifying
21 = 4u + -11

Reorder the terms:
21 = -11 + 4u

Solving
21 = -11 + 4u

Solving for variable 'u'.

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

Add '-4u' to each side of the equation.
21 + -4u = -11 + 4u + -4u

Combine like terms: 4u + -4u = 0
21 + -4u = -11 + 0
21 + -4u = -11

Add '-21' to each side of the equation.
21 + -21 + -4u = -11 + -21

Combine like terms: 21 + -21 = 0
0 + -4u = -11 + -21
-4u = -11 + -21

Combine like terms: -11 + -21 = -32
-4u = -32

Divide each side by '-4'.
u = 8

Simplifying
u = 8

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