d-10=20-d

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Solution for d-10=20-d equation:


Simplifying
d + -10 = 20 + -1d

Reorder the terms:
-10 + d = 20 + -1d

Solving
-10 + d = 20 + -1d

Solving for variable 'd'.

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

Add 'd' to each side of the equation.
-10 + d + d = 20 + -1d + d

Combine like terms: d + d = 2d
-10 + 2d = 20 + -1d + d

Combine like terms: -1d + d = 0
-10 + 2d = 20 + 0
-10 + 2d = 20

Add '10' to each side of the equation.
-10 + 10 + 2d = 20 + 10

Combine like terms: -10 + 10 = 0
0 + 2d = 20 + 10
2d = 20 + 10

Combine like terms: 20 + 10 = 30
2d = 30

Divide each side by '2'.
d = 15

Simplifying
d = 15

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