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27-11-2019
Mathematics

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If y=12 when x=15, find x when y=21.

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Yang100 Yang100

27-11-2019

Answer:

x=35

Step-by-step explanation:

15/12=x/21

simplify 15/12 into 5/3,

cross product

5/3=x/21

cross product

3*x=5*21

3x=105

x=105/3

x=35

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