3(9+7d)=-16

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Solution for 3(9+7d)=-16 equation: 


Simplifying
3(9 + 7d) = -16
(9 * 3 + 7d * 3) = -16
(27 + 21d) = -16

Solving
27 + 21d = -16

Solving for variable 'd'.

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

Add '-27' to each side of the equation.
27 + -27 + 21d = -16 + -27

Combine like terms: 27 + -27 = 0
0 + 21d = -16 + -27
21d = -16 + -27

Combine like terms: -16 + -27 = -43
21d = -43

Divide each side by '21'.
d = -2.047619048

Simplifying
d = -2.047619048

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