20=3(u+4)-5u

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Solution for 20=3(u+4)-5u equation:


Simplifying
20 = 3(u + 4) + -5u

Reorder the terms:
20 = 3(4 + u) + -5u
20 = (4 * 3 + u * 3) + -5u
20 = (12 + 3u) + -5u

Combine like terms: 3u + -5u = -2u
20 = 12 + -2u

Solving
20 = 12 + -2u

Solving for variable 'u'.

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

Add '2u' to each side of the equation.
20 + 2u = 12 + -2u + 2u

Combine like terms: -2u + 2u = 0
20 + 2u = 12 + 0
20 + 2u = 12

Add '-20' to each side of the equation.
20 + -20 + 2u = 12 + -20

Combine like terms: 20 + -20 = 0
0 + 2u = 12 + -20
2u = 12 + -20

Combine like terms: 12 + -20 = -8
2u = -8

Divide each side by '2'.
u = -4

Simplifying
u = -4

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