-7(7-d)=7d-4d

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Solution for -7(7-d)=7d-4d equation:


Simplifying
-7(7 + -1d) = 7d + -4d
(7 * -7 + -1d * -7) = 7d + -4d
(-49 + 7d) = 7d + -4d

Combine like terms: 7d + -4d = 3d
-49 + 7d = 3d

Solving
-49 + 7d = 3d

Solving for variable 'd'.

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

Add '-3d' to each side of the equation.
-49 + 7d + -3d = 3d + -3d

Combine like terms: 7d + -3d = 4d
-49 + 4d = 3d + -3d

Combine like terms: 3d + -3d = 0
-49 + 4d = 0

Add '49' to each side of the equation.
-49 + 49 + 4d = 0 + 49

Combine like terms: -49 + 49 = 0
0 + 4d = 0 + 49
4d = 0 + 49

Combine like terms: 0 + 49 = 49
4d = 49

Divide each side by '4'.
d = 12.25

Simplifying
d = 12.25

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