3[7-(3d+6)]+1=7-4(2d+1)-2d

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Solution for 3[7-(3d+6)]+1=7-4(2d+1)-2d equation:


Simplifying
3[7 + -1(3d + 6)] + 1 = 7 + -4(2d + 1) + -2d

Reorder the terms:
3[7 + -1(6 + 3d)] + 1 = 7 + -4(2d + 1) + -2d
3[7 + (6 * -1 + 3d * -1)] + 1 = 7 + -4(2d + 1) + -2d
3[7 + (-6 + -3d)] + 1 = 7 + -4(2d + 1) + -2d

Combine like terms: 7 + -6 = 1
3[1 + -3d] + 1 = 7 + -4(2d + 1) + -2d
[1 * 3 + -3d * 3] + 1 = 7 + -4(2d + 1) + -2d
[3 + -9d] + 1 = 7 + -4(2d + 1) + -2d

Reorder the terms:
3 + 1 + -9d = 7 + -4(2d + 1) + -2d

Combine like terms: 3 + 1 = 4
4 + -9d = 7 + -4(2d + 1) + -2d

Reorder the terms:
4 + -9d = 7 + -4(1 + 2d) + -2d
4 + -9d = 7 + (1 * -4 + 2d * -4) + -2d
4 + -9d = 7 + (-4 + -8d) + -2d

Combine like terms: 7 + -4 = 3
4 + -9d = 3 + -8d + -2d

Combine like terms: -8d + -2d = -10d
4 + -9d = 3 + -10d

Solving
4 + -9d = 3 + -10d

Solving for variable 'd'.

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

Add '10d' to each side of the equation.
4 + -9d + 10d = 3 + -10d + 10d

Combine like terms: -9d + 10d = 1d
4 + 1d = 3 + -10d + 10d

Combine like terms: -10d + 10d = 0
4 + 1d = 3 + 0
4 + 1d = 3

Add '-4' to each side of the equation.
4 + -4 + 1d = 3 + -4

Combine like terms: 4 + -4 = 0
0 + 1d = 3 + -4
1d = 3 + -4

Combine like terms: 3 + -4 = -1
1d = -1

Divide each side by '1'.
d = -1

Simplifying
d = -1

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