12=3(u+8)-7u

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Solution for 12=3(u+8)-7u equation:


Simplifying
12 = 3(u + 8) + -7u

Reorder the terms:
12 = 3(8 + u) + -7u
12 = (8 * 3 + u * 3) + -7u
12 = (24 + 3u) + -7u

Combine like terms: 3u + -7u = -4u
12 = 24 + -4u

Solving
12 = 24 + -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.
12 + 4u = 24 + -4u + 4u

Combine like terms: -4u + 4u = 0
12 + 4u = 24 + 0
12 + 4u = 24

Add '-12' to each side of the equation.
12 + -12 + 4u = 24 + -12

Combine like terms: 12 + -12 = 0
0 + 4u = 24 + -12
4u = 24 + -12

Combine like terms: 24 + -12 = 12
4u = 12

Divide each side by '4'.
u = 3

Simplifying
u = 3

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