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# Anyone can solve this confusion question of Math?

If 25% of X = 2Y and 30% of Y = 24

what is X ?

### 4 Answers

- Danilo SantosLv 68 years agoFavorite Answer
25% = 25 / 100 = 0.25

25% of X = 2Y

0.25X = 2Y (I)

30% = 30 / 100 = 0.3

0.3Y = 24 (II)

From (II), we have:

0.3Y = 24 ⇒ Y = 24/0,3 ⇒ Y = 80

From (I), we have:

0.25X = 2Y ⇒ 0.25X = 2*80 ⇒ 0.25X = 160 ⇒ X = 160/0.25 ∴ X = 640.

Source(s): QSL? - 8 years ago
30% of Y = 24 then 30%=24

100%=y therefore y=24*100/30=80 y = 80

if y = 80 then 2y=160

25% = 160

100% = x therefore x=160*100/25=640

Congrats x = 640

- 8 years ago
well, take it step by step, first of all in order to get X we need to find out what Y is first (since X = 2 times whatever Y is)

we know that 30% or .3 of Y=24 so --> .3y=24 which turns out to be y=80

now that we know that y=80 we can plug it in the equation of X

and since 25% or .25 of X = 2Y then --> .25X = 2(80)

now simplify .25X = 160

X = 640