20=2(u+2)-6u

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Solution for 20=2(u+2)-6u equation:


Simplifying
20 = 2(u + 2) + -6u

Reorder the terms:
20 = 2(2 + u) + -6u
20 = (2 * 2 + u * 2) + -6u
20 = (4 + 2u) + -6u

Combine like terms: 2u + -6u = -4u
20 = 4 + -4u

Solving
20 = 4 + -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 = 4 + -4u + 4u

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

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

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

Combine like terms: 4 + -20 = -16
4u = -16

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

Simplifying
u = -4

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