-7d-20=20-7d+4d

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Solution for -7d-20=20-7d+4d equation:


Simplifying
-7d + -20 = 20 + -7d + 4d

Reorder the terms:
-20 + -7d = 20 + -7d + 4d

Combine like terms: -7d + 4d = -3d
-20 + -7d = 20 + -3d

Solving
-20 + -7d = 20 + -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.
-20 + -7d + 3d = 20 + -3d + 3d

Combine like terms: -7d + 3d = -4d
-20 + -4d = 20 + -3d + 3d

Combine like terms: -3d + 3d = 0
-20 + -4d = 20 + 0
-20 + -4d = 20

Add '20' to each side of the equation.
-20 + 20 + -4d = 20 + 20

Combine like terms: -20 + 20 = 0
0 + -4d = 20 + 20
-4d = 20 + 20

Combine like terms: 20 + 20 = 40
-4d = 40

Divide each side by '-4'.
d = -10

Simplifying
d = -10

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