If 2 : 9 :: x : 18 then find the value of x.
4
8
10
12
2:9 :: x : 18 [Given] ⇒ 29=x18 ⇒ 2×18=9×x ⇒ 9x=36 ⇒ x=4 ∴ If 2 : 9 :: x : 18 then the value of x is 4.
If x=√5+2, then find the value of x−1x.
Age of a man was 25th of the age of the tree in his housing complex. The tree was 90 years old. If the man's age multiplied by a number x equals 180, then find x.
If the number 41x is divisible by 9, then find the value of digit x.