6(3-7d)=21

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Solution for 6(3-7d)=21 equation: 


Simplifying
6(3 + -7d) = 21
(3 * 6 + -7d * 6) = 21
(18 + -42d) = 21

Solving
18 + -42d = 21

Solving for variable 'd'.

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

Add '-18' to each side of the equation.
18 + -18 + -42d = 21 + -18

Combine like terms: 18 + -18 = 0
0 + -42d = 21 + -18
-42d = 21 + -18

Combine like terms: 21 + -18 = 3
-42d = 3

Divide each side by '-42'.
d = -0.07142857143

Simplifying
d = -0.07142857143

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