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.

x = 14

Step-by-step explanation:

To solve this problem, we must remember that the addition of two angles that create a straight line should have a sum of 180 degrees.

From this information, we can create the following equation.

(7x - 1) + (6x - 1) = 180

Eliminating the parentheses and grouping like terms gives us:

(7x + 6x) + (-1 + -1) = 180

Simplifying inside the parentheses on the left side produces:

13x - 2 = 180

Next, we should add 2 to both sides to isolate the variable term:

13x = 182

Finally, we should divide by 13 to get the x by itself on the left side of the equation:

13x/13 = 182/13

x = 14

Therefore, the answer to your question is x = 14.

Hope this helps!