20=-8u+4(u-2)

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Solution for 20=-8u+4(u-2) equation: 


Simplifying
20 = -8u + 4(u + -2)

Reorder the terms:
20 = -8u + 4(-2 + u)
20 = -8u + (-2 * 4 + u * 4)
20 = -8u + (-8 + 4u)

Reorder the terms:
20 = -8 + -8u + 4u

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

Solving
20 = -8 + -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.
20 + 4u = -8 + -4u + 4u

Combine like terms: -4u + 4u = 0
20 + 4u = -8 + 0
20 + 4u = -8

Add '-20' to each side of the equation.
20 + -20 + 4u = -8 + -20

Combine like terms: 20 + -20 = 0
0 + 4u = -8 + -20
4u = -8 + -20

Combine like terms: -8 + -20 = -28
4u = -28

Divide each side by '4'.
u = -7

Simplifying
u = -7

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