Question

If x varies as y , and y = 7 when x = 18, find x when y is 21.
The answer is 54.
Can anyone give me the solution now
Any scholar
pls......​

Answer 1

Answer:

Yes, the answer is 54.

Step-by-step explanation:

It is because if y=7 then x=18.

So, if y= 21 means three times its first value so x will also multiplied by 3. so, x=18×3= 54.

Answer 2

ANSWER:-

★ To find :-

•  The value of x

★Given:-

• y= 7 and x = 18.

★ Calculation :-

ATQ,

• y = k x .........(1)

• y = 7 ............(2)

Substituting (2) in (1),

7 = k x

k = 7/x

• k = 7/18

==> Therefore,

y = x 7/18

Putting y = 21,

21 = 7/18 x

==> Therefore,

• x = 54

★ The answer is 54.