Mitgupri99 Mitgupri99

25-03-2021
Mathematics

contestada

please help i have no idea what im doing!

please help i have no idea what im doing class=

Respuesta :

student026 student026

25-03-2021

Answer:

x represents hours of babysitting

y represents hours of music lesson

hours on babysitting: 11

hours on music lessons: 7

Step-by-step explanation:

x+y=18

5x+12y=139

-5(x+y=18)

=-5x-5y=-90

(5x+12y=139) + (-5x-5y=-90)

7y=49

y=7

x+7=18

x=11

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