11=-d+20

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Solution for 11=-d+20 equation:


Simplifying
11 = -1d + 20

Reorder the terms:
11 = 20 + -1d

Solving
11 = 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.
11 + d = 20 + -1d + d

Combine like terms: -1d + d = 0
11 + d = 20 + 0
11 + d = 20

Add '-11' to each side of the equation.
11 + -11 + d = 20 + -11

Combine like terms: 11 + -11 = 0
0 + d = 20 + -11
d = 20 + -11

Combine like terms: 20 + -11 = 9
d = 9

Simplifying
d = 9

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