Astore is selling two mixtures of coffee beans in one-pound bags. the first mixture has 12 ounces of sumatra combined with 4 ounces of celebes kalossi, and costs $42 the second mixture has 4 ounces of sumatra and 12 ounces of celebes kalossi, and costs $30 how much does one ounce of sumatra and one ounce of celebes kalossi cost?

Cost of One ounce Sumatra = $3.00

and one ounce Celebes Kalossi = $1.50

Step-by-step explanation:

Let the cost of Sumatra be 'x' and Kalossi be 'y'

From the statement "12 ounces of Sumatra combined with 4 ounces of Celebes Kalossi costs $42.00" we make equation (1)

12x + 4y = 42 (1)

From the second statement "4 ounces of Sumatra and 12 ounces of Celebes Kalossi, costs $30

4x + 12y = 30 (2)

Multiplying equation (1) by -3

-36x - 12y = - 126

  4x + 12y =  30

 -32x =  - 96

      x = 3

12(3) + 4y = 42

      y = 1.5

Therefore, the cost of one ounce of Sumatra $3.00 and the cost of one ounce of Celebes Kalossi would be $1.50

b. x- 48 =120

step-by-step explanation: