100=75-D

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Solution for 100=75-D equation:


Simplifying
100 = 75 + -1D

Solving
100 = 75 + -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.
100 + D = 75 + -1D + D

Combine like terms: -1D + D = 0
100 + D = 75 + 0
100 + D = 75

Add '-100' to each side of the equation.
100 + -100 + D = 75 + -100

Combine like terms: 100 + -100 = 0
0 + D = 75 + -100
D = 75 + -100

Combine like terms: 75 + -100 = -25
D = -25

Simplifying
D = -25

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