-2(d+20)-8d=20

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


Simplifying
-2(d + 20) + -8d = 20

Reorder the terms:
-2(20 + d) + -8d = 20
(20 * -2 + d * -2) + -8d = 20
(-40 + -2d) + -8d = 20

Combine like terms: -2d + -8d = -10d
-40 + -10d = 20

Solving
-40 + -10d = 20

Solving for variable 'd'.

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

Add '40' to each side of the equation.
-40 + 40 + -10d = 20 + 40

Combine like terms: -40 + 40 = 0
0 + -10d = 20 + 40
-10d = 20 + 40

Combine like terms: 20 + 40 = 60
-10d = 60

Divide each side by '-10'.
d = -6

Simplifying
d = -6

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