Question

plz solve these i need it urgent..
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Answer 1

Step-by-step explanation:

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Answer 2

Answer:

x:y=2:3

y:z=5:7

so,multiply first equation with 5

5×2:5×3

10:15

Then,multiply 3 with 5:7

3×5:3×7

15:21

so,the answer is10:15:21