2(d+6)=9(d-1)

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Solution for 2(d+6)=9(d-1) equation:


Simplifying
2(d + 6) = 9(d + -1)

Reorder the terms:
2(6 + d) = 9(d + -1)
(6 * 2 + d * 2) = 9(d + -1)
(12 + 2d) = 9(d + -1)

Reorder the terms:
12 + 2d = 9(-1 + d)
12 + 2d = (-1 * 9 + d * 9)
12 + 2d = (-9 + 9d)

Solving
12 + 2d = -9 + 9d

Solving for variable 'd'.

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

Add '-9d' to each side of the equation.
12 + 2d + -9d = -9 + 9d + -9d

Combine like terms: 2d + -9d = -7d
12 + -7d = -9 + 9d + -9d

Combine like terms: 9d + -9d = 0
12 + -7d = -9 + 0
12 + -7d = -9

Add '-12' to each side of the equation.
12 + -12 + -7d = -9 + -12

Combine like terms: 12 + -12 = 0
0 + -7d = -9 + -12
-7d = -9 + -12

Combine like terms: -9 + -12 = -21
-7d = -21

Divide each side by '-7'.
d = 3

Simplifying
d = 3

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