If x increased by the product of 8 and y is 76, and 8x increased by the product of 8 and y is 104, what are the values of x and y?

x = 4, y = 9

Step-by-step explanation:

(1)   x + 8y =  76

(2) 8x + 8y = 104

             7x = 28     Subtracted (1) from (2)

(3)            x =  4      Divided each side by 7

      4 + 8y = 76      Substituted (3) into (1)

            8y = 72      Subtracted 32 from each side

              y =   9     Divided each side by 8

The solution is x = 4, y = 9

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