43-15=D

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Solution for 43-15=D equation:


Simplifying
43 + -15 = D

Combine like terms: 43 + -15 = 28
28 = D

Solving
28 = D

Solving for variable 'D'.

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

Add '-1D' to each side of the equation.
28 + -1D = D + -1D

Combine like terms: D + -1D = 0
28 + -1D = 0

Add '-28' to each side of the equation.
28 + -28 + -1D = 0 + -28

Combine like terms: 28 + -28 = 0
0 + -1D = 0 + -28
-1D = 0 + -28

Combine like terms: 0 + -28 = -28
-1D = -28

Divide each side by '-1'.
D = 28

Simplifying
D = 28

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