7n-9+d=90

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Solution for 7n-9+d=90 equation:


Simplifying
7n + -9 + d = 90

Reorder the terms:
-9 + d + 7n = 90

Solving
-9 + d + 7n = 90

Solving for variable 'd'.

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

Add '9' to each side of the equation.
-9 + d + 9 + 7n = 90 + 9

Reorder the terms:
-9 + 9 + d + 7n = 90 + 9

Combine like terms: -9 + 9 = 0
0 + d + 7n = 90 + 9
d + 7n = 90 + 9

Combine like terms: 90 + 9 = 99
d + 7n = 99

Add '-7n' to each side of the equation.
d + 7n + -7n = 99 + -7n

Combine like terms: 7n + -7n = 0
d + 0 = 99 + -7n
d = 99 + -7n

Simplifying
d = 99 + -7n

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