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

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


Simplifying
-20 + -1u = -3(-5u + -20)

Reorder the terms:
-20 + -1u = -3(-20 + -5u)
-20 + -1u = (-20 * -3 + -5u * -3)
-20 + -1u = (60 + 15u)

Solving
-20 + -1u = 60 + 15u

Solving for variable 'u'.

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

Add '-15u' to each side of the equation.
-20 + -1u + -15u = 60 + 15u + -15u

Combine like terms: -1u + -15u = -16u
-20 + -16u = 60 + 15u + -15u

Combine like terms: 15u + -15u = 0
-20 + -16u = 60 + 0
-20 + -16u = 60

Add '20' to each side of the equation.
-20 + 20 + -16u = 60 + 20

Combine like terms: -20 + 20 = 0
0 + -16u = 60 + 20
-16u = 60 + 20

Combine like terms: 60 + 20 = 80
-16u = 80

Divide each side by '-16'.
u = -5

Simplifying
u = -5

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