Question

N divided by 5 plus negative 6 equals 9. whats n?

Answer 1

So,

$\frac{n}{5} + -6 = 9$
$\frac{n}{5} - 6 = 9$

Add 6 to both sides
$\frac{n}{5} = 15$

Multiply both sides by 5
$n = 75$

Check
$\frac{75}{5} - 6 = 9$
$15 - 6 = 9$
$9 = 9\ This\ checks.$

S = {75}

Answer 2

N/5 -6 = 9 simplifies to n/5 = 15 then you can cross multiply and that comes out to 75 so n = 75