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

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


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

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

Reorder the terms:
-24 + -8u + 3u = 21

Combine like terms: -8u + 3u = -5u
-24 + -5u = 21

Solving
-24 + -5u = 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 + -5u = 21 + 24

Combine like terms: -24 + 24 = 0
0 + -5u = 21 + 24
-5u = 21 + 24

Combine like terms: 21 + 24 = 45
-5u = 45

Divide each side by '-5'.
u = -9

Simplifying
u = -9

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