(D-10)-(2d-20)=

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Solution for (D-10)-(2d-20)= equation:


Simplifying
(D + -10) + -1(2d + -20) = 0

Reorder the terms:
(-10 + D) + -1(2d + -20) = 0

Remove parenthesis around (-10 + D)
-10 + D + -1(2d + -20) = 0

Reorder the terms:
-10 + D + -1(-20 + 2d) = 0
-10 + D + (-20 * -1 + 2d * -1) = 0
-10 + D + (20 + -2d) = 0

Reorder the terms:
-10 + 20 + D + -2d = 0

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

Solving
10 + D + -2d = 0

Solving for variable 'D'.

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

Add '-10' to each side of the equation.
10 + D + -10 + -2d = 0 + -10

Reorder the terms:
10 + -10 + D + -2d = 0 + -10

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

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

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

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

Simplifying
D = -10 + 2d

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