Q11 of 90 Page 113

If, then n = ?

By cross multiplication,

9n = 4(n + 15)

⇒ 5n = 60

⇒ n = 12

if , then x = ?

If then x = ?

If 3(t - 3) = 5(2t + 1), then t = ?

Four - fifths of a number is greater than three - fourths of the number by 4. The number is