2u-21-6u=3

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Solution for 2u-21-6u=3 equation:


Simplifying
2u + -21 + -6u = 3

Reorder the terms:
-21 + 2u + -6u = 3

Combine like terms: 2u + -6u = -4u
-21 + -4u = 3

Solving
-21 + -4u = 3

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 + -4u = 3 + 21

Combine like terms: -21 + 21 = 0
0 + -4u = 3 + 21
-4u = 3 + 21

Combine like terms: 3 + 21 = 24
-4u = 24

Divide each side by '-4'.
u = -6

Simplifying
u = -6

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