(n+9)+(d+21)=10

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Solution for (n+9)+(d+21)=10 equation:


Simplifying
(n + 9) + (d + 21) = 10

Reorder the terms:
(9 + n) + (d + 21) = 10

Remove parenthesis around (9 + n)
9 + n + (d + 21) = 10

Reorder the terms:
9 + n + (21 + d) = 10

Remove parenthesis around (21 + d)
9 + n + 21 + d = 10

Reorder the terms:
9 + 21 + d + n = 10

Combine like terms: 9 + 21 = 30
30 + d + n = 10

Solving
30 + d + n = 10

Solving for variable 'd'.

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

Add '-30' to each side of the equation.
30 + d + -30 + n = 10 + -30

Reorder the terms:
30 + -30 + d + n = 10 + -30

Combine like terms: 30 + -30 = 0
0 + d + n = 10 + -30
d + n = 10 + -30

Combine like terms: 10 + -30 = -20
d + n = -20

Add '-1n' to each side of the equation.
d + n + -1n = -20 + -1n

Combine like terms: n + -1n = 0
d + 0 = -20 + -1n
d = -20 + -1n

Simplifying
d = -20 + -1n

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