Respuesta :

01xpr2

Answer: 12

Step-by-step explanation: used Cymath calculator, i recommend it very helpful

Answer:

12

Step-by-step explanation:

14/10=(y+9)/15

cross product

10(y+9)=14*15

10y+90=210

10y=210-90

10y=120

y=120/10

y=12

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