9=3n+(4n-15)

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Solution for 9=3n+(4n-15) equation:


Simplifying
9 = 3n + (4n + -15)

Reorder the terms:
9 = 3n + (-15 + 4n)

Remove parenthesis around (-15 + 4n)
9 = 3n + -15 + 4n

Reorder the terms:
9 = -15 + 3n + 4n

Combine like terms: 3n + 4n = 7n
9 = -15 + 7n

Solving
9 = -15 + 7n

Solving for variable 'n'.

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

Add '-7n' to each side of the equation.
9 + -7n = -15 + 7n + -7n

Combine like terms: 7n + -7n = 0
9 + -7n = -15 + 0
9 + -7n = -15

Add '-9' to each side of the equation.
9 + -9 + -7n = -15 + -9

Combine like terms: 9 + -9 = 0
0 + -7n = -15 + -9
-7n = -15 + -9

Combine like terms: -15 + -9 = -24
-7n = -24

Divide each side by '-7'.
n = 3.428571429

Simplifying
n = 3.428571429

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