3(u-8)-6u=-21

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Solution for 3(u-8)-6u=-21 equation: 


Simplifying
3(u + -8) + -6u = -21

Reorder the terms:
3(-8 + u) + -6u = -21
(-8 * 3 + u * 3) + -6u = -21
(-24 + 3u) + -6u = -21

Combine like terms: 3u + -6u = -3u
-24 + -3u = -21

Solving
-24 + -3u = -21

Solving for variable 'u'.

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

Add '24' to each side of the equation.
-24 + 24 + -3u = -21 + 24

Combine like terms: -24 + 24 = 0
0 + -3u = -21 + 24
-3u = -21 + 24

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

Divide each side by '-3'.
u = -1

Simplifying
u = -1

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