10(1+3d)=-20

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Solution for 10(1+3d)=-20 equation: 


Simplifying
10(1 + 3d) = -20
(1 * 10 + 3d * 10) = -20
(10 + 30d) = -20

Solving
10 + 30d = -20

Solving for variable 'd'.

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

Add '-10' to each side of the equation.
10 + -10 + 30d = -20 + -10

Combine like terms: 10 + -10 = 0
0 + 30d = -20 + -10
30d = -20 + -10

Combine like terms: -20 + -10 = -30
30d = -30

Divide each side by '30'.
d = -1

Simplifying
d = -1

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