28=3d-7d

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Solution for 28=3d-7d equation:


Simplifying
28 = 3d + -7d

Combine like terms: 3d + -7d = -4d
28 = -4d

Solving
28 = -4d

Solving for variable 'd'.

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

Add '4d' to each side of the equation.
28 + 4d = -4d + 4d

Combine like terms: -4d + 4d = 0
28 + 4d = 0

Add '-28' to each side of the equation.
28 + -28 + 4d = 0 + -28

Combine like terms: 28 + -28 = 0
0 + 4d = 0 + -28
4d = 0 + -28

Combine like terms: 0 + -28 = -28
4d = -28

Divide each side by '4'.
d = -7

Simplifying
d = -7

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