7(3D+4)=7

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Solution for 7(3D+4)=7 equation: 


Simplifying
7(3D + 4) = 7

Reorder the terms:
7(4 + 3D) = 7
(4 * 7 + 3D * 7) = 7
(28 + 21D) = 7

Solving
28 + 21D = 7

Solving for variable 'D'.

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

Add '-28' to each side of the equation.
28 + -28 + 21D = 7 + -28

Combine like terms: 28 + -28 = 0
0 + 21D = 7 + -28
21D = 7 + -28

Combine like terms: 7 + -28 = -21
21D = -21

Divide each side by '21'.
D = -1

Simplifying
D = -1

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