A

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Q. If 2x +3y = 30 and (x+y)/y = 11/8, then find the value of 5y + 6x

  • (A) 72
  • (B) 58
  • (C) 64
  • (D) 29
Correct Answer - Option(B)
Explanation by: Admin 
The given equations are :
2x + 3y = 30 --------- (i)
and, (x+y)/y = 11/8
8x + 8y = 11y
8x – 3y =0 ----(ii)
Adding (i) & (ii), we get : 10 x = 30 or x = 3.
Put x = 3 in (i), we get : y = 8
Therefore, 5y + 6x = (5 × 8 + 6 × 3) = 40 + 18 = 58.

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