3n+4(n-9)=78

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Solution for 3n+4(n-9)=78 equation:


Simplifying
3n + 4(n + -9) = 78

Reorder the terms:
3n + 4(-9 + n) = 78
3n + (-9 * 4 + n * 4) = 78
3n + (-36 + 4n) = 78

Reorder the terms:
-36 + 3n + 4n = 78

Combine like terms: 3n + 4n = 7n
-36 + 7n = 78

Solving
-36 + 7n = 78

Solving for variable 'n'.

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

Add '36' to each side of the equation.
-36 + 36 + 7n = 78 + 36

Combine like terms: -36 + 36 = 0
0 + 7n = 78 + 36
7n = 78 + 36

Combine like terms: 78 + 36 = 114
7n = 114

Divide each side by '7'.
n = 16.28571429

Simplifying
n = 16.28571429

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