d+21=36

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Solution for d+21=36 equation: 


Simplifying
d + 21 = 36

Reorder the terms:
21 + d = 36

Solving
21 + d = 36

Solving for variable 'd'.

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

Add '-21' to each side of the equation.
21 + -21 + d = 36 + -21

Combine like terms: 21 + -21 = 0
0 + d = 36 + -21
d = 36 + -21

Combine like terms: 36 + -21 = 15
d = 15

Simplifying
d = 15

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