Abookkeeper needs to post the cost of a desk and chair into his records. the cost of the desk was 5 times more than the chair. the total cost for both is 720, what was the cost of the chair?

Let's say d is the cost of the desk and c is the cost of the chair. We know that:

c + d = 720

and

d = 5 * c

We can substitute d in the first equation with 5 * c to solve for c. c = $120.

sin3a=12/15

step-by-step explanation:

since one side was multiplied by 3 the other side must also be multiplied by 3.