Question

Seven subtracted from the quotient of a number and 2 is -6

Answer 1

18 / n - 7 = 2  

18 / n =9  

18 = 9n  

2 = n  

18 / 2 - 7 = 2  

9 - 7 = 2  

2 = 2

Answer 2

N/2 -7 = -6

add 7 to both sides;
n/2 -7+7 = -6+7

n/2 = 1
multiply both sides by 2 (  or divide by 1/2 ) in order to get n by itself.

n/2 * 2/1 = 1 * 2/1

n = 2