To divide by a fraction, you multiply by its reciprocal, which you find by flipping the numerator and the denominator. 
Multiply the numerators and the denominators separately. 
Simplify by dividing both sides of the equation by 
. 
I might be wrong but I think you divide each number by each other to get the answers
3x - y = 9
4x + y = 5
---------------add
7x = 14
x = 14/7
x = 2
3x - y = 9
3(2) - y = 9
6 - y = 9
-y = 9 - 6
-y = 3
y = -3
C. (2,-3) is a solution to the system of linear equations
8n. 8 represents the number of hours she sleeps, and n represents the number of night she sleeps.
Ok so you first you move the 2h to the top and and 兀r is multiplied by ten of course and then you get the answer <span>兀r 34029h</span>
