(9-n)7-4n=42

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Solution for (9-n)7-4n=42 equation:


Simplifying
(9 + -1n) * 7 + -4n = 42

Reorder the terms for easier multiplication:
7(9 + -1n) + -4n = 42
(9 * 7 + -1n * 7) + -4n = 42
(63 + -7n) + -4n = 42

Combine like terms: -7n + -4n = -11n
63 + -11n = 42

Solving
63 + -11n = 42

Solving for variable 'n'.

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

Add '-63' to each side of the equation.
63 + -63 + -11n = 42 + -63

Combine like terms: 63 + -63 = 0
0 + -11n = 42 + -63
-11n = 42 + -63

Combine like terms: 42 + -63 = -21
-11n = -21

Divide each side by '-11'.
n = 1.909090909

Simplifying
n = 1.909090909

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