Question

(11) If x varies directly as y and x=7 when y=28, find x when y = 84. ​

Answer 1

X become 21...

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Answer 2

Answer:

X= 21

Step-by-step explanation:

as you know X is directly proportional to Y

which means the ratio between them remains constant

when X= 7, Y = 28

which means the ratio k=X/Y= 1/4

similarly when X= ?, Y= 84

but we know k value that is 1/4

hence , X/Y = k

X/84= 1/4

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hence X is 21