8=3(u-4)-7u

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Solution for 8=3(u-4)-7u equation:


Simplifying
8 = 3(u + -4) + -7u

Reorder the terms:
8 = 3(-4 + u) + -7u
8 = (-4 * 3 + u * 3) + -7u
8 = (-12 + 3u) + -7u

Combine like terms: 3u + -7u = -4u
8 = -12 + -4u

Solving
8 = -12 + -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.
8 + 4u = -12 + -4u + 4u

Combine like terms: -4u + 4u = 0
8 + 4u = -12 + 0
8 + 4u = -12

Add '-8' to each side of the equation.
8 + -8 + 4u = -12 + -8

Combine like terms: 8 + -8 = 0
0 + 4u = -12 + -8
4u = -12 + -8

Combine like terms: -12 + -8 = -20
4u = -20

Divide each side by '4'.
u = -5

Simplifying
u = -5

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