d+5+d+7=-4

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Solution for d+5+d+7=-4 equation:


Simplifying
d + 5 + d + 7 = -4

Reorder the terms:
5 + 7 + d + d = -4

Combine like terms: 5 + 7 = 12
12 + d + d = -4

Combine like terms: d + d = 2d
12 + 2d = -4

Solving
12 + 2d = -4

Solving for variable 'd'.

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

Add '-12' to each side of the equation.
12 + -12 + 2d = -4 + -12

Combine like terms: 12 + -12 = 0
0 + 2d = -4 + -12
2d = -4 + -12

Combine like terms: -4 + -12 = -16
2d = -16

Divide each side by '2'.
d = -8

Simplifying
d = -8

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