3(3d-1)+7(2d+1)=d

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Solution for 3(3d-1)+7(2d+1)=d equation:


Simplifying
3(3d + -1) + 7(2d + 1) = d

Reorder the terms:
3(-1 + 3d) + 7(2d + 1) = d
(-1 * 3 + 3d * 3) + 7(2d + 1) = d
(-3 + 9d) + 7(2d + 1) = d

Reorder the terms:
-3 + 9d + 7(1 + 2d) = d
-3 + 9d + (1 * 7 + 2d * 7) = d
-3 + 9d + (7 + 14d) = d

Reorder the terms:
-3 + 7 + 9d + 14d = d

Combine like terms: -3 + 7 = 4
4 + 9d + 14d = d

Combine like terms: 9d + 14d = 23d
4 + 23d = d

Solving
4 + 23d = d

Solving for variable 'd'.

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

Add '-1d' to each side of the equation.
4 + 23d + -1d = d + -1d

Combine like terms: 23d + -1d = 22d
4 + 22d = d + -1d

Combine like terms: d + -1d = 0
4 + 22d = 0

Add '-4' to each side of the equation.
4 + -4 + 22d = 0 + -4

Combine like terms: 4 + -4 = 0
0 + 22d = 0 + -4
22d = 0 + -4

Combine like terms: 0 + -4 = -4
22d = -4

Divide each side by '22'.
d = -0.1818181818

Simplifying
d = -0.1818181818

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