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OverLord2011 [107]
3 years ago
15

Please help i have no idea what im doing!

Mathematics
1 answer:
Tju [1.3M]3 years ago
4 0

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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