16=21+d

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Solution for 16=21+d equation:


Simplifying
16 = 21 + d

Solving
16 = 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.
16 + -1d = 21 + d + -1d

Combine like terms: d + -1d = 0
16 + -1d = 21 + 0
16 + -1d = 21

Add '-16' to each side of the equation.
16 + -16 + -1d = 21 + -16

Combine like terms: 16 + -16 = 0
0 + -1d = 21 + -16
-1d = 21 + -16

Combine like terms: 21 + -16 = 5
-1d = 5

Divide each side by '-1'.
d = -5

Simplifying
d = -5

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