38=d+21

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Solution for 38=d+21 equation:


Simplifying
38 = d + 21

Reorder the terms:
38 = 21 + d

Solving
38 = 21 + 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.
38 + -1d = 21 + d + -1d

Combine like terms: d + -1d = 0
38 + -1d = 21 + 0
38 + -1d = 21

Add '-38' to each side of the equation.
38 + -38 + -1d = 21 + -38

Combine like terms: 38 + -38 = 0
0 + -1d = 21 + -38
-1d = 21 + -38

Combine like terms: 21 + -38 = -17
-1d = -17

Divide each side by '-1'.
d = 17

Simplifying
d = 17

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