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IrinaK [193]
3 years ago
9

Janet and Kyle each purchase Blu Ray discs and Cd's from Amazon. Janet buys 3 Blu ray and 2 Cd's for $58. Kyle buys 1 Blu Ray an

d 4 Cd's for $46. How much does each Blu Ray and CD cost?
Mathematics
1 answer:
polet [3.4K]3 years ago
7 0

Answer:

y = 20   x = 6

Step-by-step explanation:

1 (3x+ 2y = 58 ------------>  -3x + -2y = -58

1x + 2y = 46 -------------->    1x + 2y = 46  

                                              ____________

                                                -2x  =  -12

                                               -----------------

                                                -2x       -2x

                                                 x = 6

3(6) + 2y = 58

18 + 2y = 58

-18          -18                                    

------------------

       2y = 40

      -----  -----

       2y     2y

y = 20

                                               

                                           

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