Home » Aptitude » Algebra » Question
  1. If 4x + 5y = 83 and 3x : 2y = 21 : 22, then (y – x) equals
    1. 3
    2. 4
    3. 7
    4. 11
Correct Option: B

3x
=
21
2y22

x
=
21
×
2
=
7
y22311

x
=
y
= k
711

∴ 4x + 5y = 83
⇒ 4 × 7k + 5 × 11k = 83
⇒ 28k + 55k = 83
⇒ 83k = 83
⇒ k = 1
∴ x = 7, y = 11
∴ y – x = 11 – 7 = 4



Your comments will be displayed only after manual approval.