Percentages
Aptitude

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Q.

If 50% of $x$ equals the sum of $y$ and 20, then what is the value of $x – 2y$?

 A.

20

 B.

40

 C.

60

 D.

80

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Solution:
Option(B) is correct

50% of $x$ equals the sum of $y$ and 20. Expressing this as an equation yields:

$\left(\dfrac{50}{100}\right)×x = y + 20$

$\dfrac{x}{2} = y + 20$

$x = 2y + 40$

$x – 2y = $ 40


(1) Comment(s)


Vejayanantham TR
 ()

0.5x = y+20

(multiply by 2 on both sides)

x=2y+40

x-2y = 40