8=3u+7(u+4)

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


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

Reorder the terms:
8 = 3u + 7(4 + u)
8 = 3u + (4 * 7 + u * 7)
8 = 3u + (28 + 7u)

Reorder the terms:
8 = 28 + 3u + 7u

Combine like terms: 3u + 7u = 10u
8 = 28 + 10u

Solving
8 = 28 + 10u

Solving for variable 'u'.

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

Add '-10u' to each side of the equation.
8 + -10u = 28 + 10u + -10u

Combine like terms: 10u + -10u = 0
8 + -10u = 28 + 0
8 + -10u = 28

Add '-8' to each side of the equation.
8 + -8 + -10u = 28 + -8

Combine like terms: 8 + -8 = 0
0 + -10u = 28 + -8
-10u = 28 + -8

Combine like terms: 28 + -8 = 20
-10u = 20

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

Simplifying
u = -2

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