7d+d-d-4d-7=5d

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


Simplifying
7d + d + -1d + -4d + -7 = 5d

Reorder the terms:
-7 + 7d + d + -1d + -4d = 5d

Combine like terms: 7d + d = 8d
-7 + 8d + -1d + -4d = 5d

Combine like terms: 8d + -1d = 7d
-7 + 7d + -4d = 5d

Combine like terms: 7d + -4d = 3d
-7 + 3d = 5d

Solving
-7 + 3d = 5d

Solving for variable 'd'.

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

Add '-5d' to each side of the equation.
-7 + 3d + -5d = 5d + -5d

Combine like terms: 3d + -5d = -2d
-7 + -2d = 5d + -5d

Combine like terms: 5d + -5d = 0
-7 + -2d = 0

Add '7' to each side of the equation.
-7 + 7 + -2d = 0 + 7

Combine like terms: -7 + 7 = 0
0 + -2d = 0 + 7
-2d = 0 + 7

Combine like terms: 0 + 7 = 7
-2d = 7

Divide each side by '-2'.
d = -3.5

Simplifying
d = -3.5

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