yesirr56 yesirr56

09-07-2021
Mathematics

contestada

Helppppp pls and thankyouuu

Helppppp pls and thankyouuu class=

Respuesta :

reinhard10158 reinhard10158

11-07-2021

Answer:

20 minutes on the stationary bike

10 minutes on the treadmill

Step-by-step explanation:

x = minutes on bike

y = minutes on treadmill

x + y = 30

12x + 15y = 390

x = 30-y

12(30-y) + 15y = 390

360 - 12y + 15y = 390

3y = 30

y = 10

x + 10 = 30

x = 20

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