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

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

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

Reorder the terms:
-4u + 2(-8 + u) = -20
-4u + (-8 * 2 + u * 2) = -20
-4u + (-16 + 2u) = -20

Reorder the terms:
-16 + -4u + 2u = -20

Combine like terms: -4u + 2u = -2u
-16 + -2u = -20

Solving
-16 + -2u = -20

Solving for variable 'u'.

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

Add '16' to each side of the equation.
-16 + 16 + -2u = -20 + 16

Combine like terms: -16 + 16 = 0
0 + -2u = -20 + 16
-2u = -20 + 16

Combine like terms: -20 + 16 = -4
-2u = -4

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

Simplifying
u = 2