A music store bought a CD set at a cost of $870. When the store sold the CD set, the percent markup was 25%. Find the selling price.

Price of CD before markup : 870

Markup:    870 x 0.25 = 218.75

CD + markup        = 1087.75

Directly = CD x  1.25 = 1087.5

 $1087.50

Step-by-step explanation:

The markup is added to the cost price to get the selling price.

  $870 + 25%×$870 = selling price

  $870×(1.25) = selling price = $1087.50 . . . . . simplify

simplifying

5(x + -6) = 2(x + 3)

reorder the terms:

5(-6 + x) = 2(x + 3)

(-6 * 5 + x * 5) = 2(x + 3)

(-30 + 5x) = 2(x + 3)

reorder the terms:

-30 + 5x = 2(3 + x)

-30 + 5x = (3 * 2 + x * 2)

-30 + 5x = (6 + 2x)

solving

-30 + 5x = 6 + 2x

solving for variable 'x'.

move all terms containing x to the left, all other terms to the right.

add '-2x' to each side of the equation.

-30 + 5x + -2x = 6 + 2x + -2x

combine like terms: 5x + -2x = 3x

-30 + 3x = 6 + 2x + -2x

combine like terms: 2x + -2x = 0

-30 + 3x = 6 + 0

-30 + 3x = 6

add '30' to each side of the equation.

-30 + 30 + 3x = 6 + 30

combine like terms: -30 + 30 = 0

0 + 3x = 6 + 30

3x = 6 + 30

combine like terms: 6 + 30 = 36

3x = 36

divide each side by '3'.

x = 12

simplifying

x = 12

this should .

final total: 63

step-by-step explanation:

60 times sales tax

60 times 0.05

3

60 + 3

63