-20=3(u-8)-5u

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Solution for -20=3(u-8)-5u equation:


Simplifying
-20 = 3(u + -8) + -5u

Reorder the terms:
-20 = 3(-8 + u) + -5u
-20 = (-8 * 3 + u * 3) + -5u
-20 = (-24 + 3u) + -5u

Combine like terms: 3u + -5u = -2u
-20 = -24 + -2u

Solving
-20 = -24 + -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 = -24 + -2u + 2u

Combine like terms: -2u + 2u = 0
-20 + 2u = -24 + 0
-20 + 2u = -24

Add '20' to each side of the equation.
-20 + 20 + 2u = -24 + 20

Combine like terms: -20 + 20 = 0
0 + 2u = -24 + 20
2u = -24 + 20

Combine like terms: -24 + 20 = -4
2u = -4

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

Simplifying
u = -2

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