[u-8]=3[u+4]

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Solution for [u-8]=3[u+4] equation:


Simplifying
[u + -8] = 3[u + 4]

Reorder the terms:
[-8 + u] = 3[u + 4]

Remove brackets around [-8 + u]
-8 + u = 3[u + 4]

Reorder the terms:
-8 + u = 3[4 + u]
-8 + u = [4 * 3 + u * 3]
-8 + u = [12 + 3u]

Solving
-8 + u = 12 + 3u

Solving for variable 'u'.

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

Add '-3u' to each side of the equation.
-8 + u + -3u = 12 + 3u + -3u

Combine like terms: u + -3u = -2u
-8 + -2u = 12 + 3u + -3u

Combine like terms: 3u + -3u = 0
-8 + -2u = 12 + 0
-8 + -2u = 12

Add '8' to each side of the equation.
-8 + 8 + -2u = 12 + 8

Combine like terms: -8 + 8 = 0
0 + -2u = 12 + 8
-2u = 12 + 8

Combine like terms: 12 + 8 = 20
-2u = 20

Divide each side by '-2'.
u = -10

Simplifying
u = -10

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