5(1+8d)=-21

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Solution for 5(1+8d)=-21 equation: 


Simplifying
5(1 + 8d) = -21
(1 * 5 + 8d * 5) = -21
(5 + 40d) = -21

Solving
5 + 40d = -21

Solving for variable 'd'.

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

Add '-5' to each side of the equation.
5 + -5 + 40d = -21 + -5

Combine like terms: 5 + -5 = 0
0 + 40d = -21 + -5
40d = -21 + -5

Combine like terms: -21 + -5 = -26
40d = -26

Divide each side by '40'.
d = -0.65

Simplifying
d = -0.65

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