9+6(1-5d)=21

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Solution for 9+6(1-5d)=21 equation:


Simplifying
9 + 6(1 + -5d) = 21
9 + (1 * 6 + -5d * 6) = 21
9 + (6 + -30d) = 21

Combine like terms: 9 + 6 = 15
15 + -30d = 21

Solving
15 + -30d = 21

Solving for variable 'd'.

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

Add '-15' to each side of the equation.
15 + -15 + -30d = 21 + -15

Combine like terms: 15 + -15 = 0
0 + -30d = 21 + -15
-30d = 21 + -15

Combine like terms: 21 + -15 = 6
-30d = 6

Divide each side by '-30'.
d = -0.2

Simplifying
d = -0.2

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