If `x:2 1/3 :: 21:50`, then what is the value of `x?`

If 12x^2-21x+1=0 , then what is the value of 9x^2+(16x^2)^-1 ? यदि 12x^2-21x+1=0 है, तो 9x^2+(16x^2)^-1 का मान क्या होगा ?

If x+((1)/(x))=2 , then what is the value of x^(21)+((1)/(x^(1331))) ?

If (i) 4x+5y=83 and (3x)/(2y)=(21)/(22), then what is the value of y-x? (ii) (x)/(4)-(x-3)/(6)=1 then find the value of x.

If x^(4) +x^(2)y^(2)+y^(4)=21 , and x^(2)+xy+y^(2)=3 then what is the value of 4xy?

If x - (1)/( x) = sqrt21, then the value of (x ^(2) + (1)/( x ^(2))) (x + (1)/(x)) is

If (3(x-1))/(2)=(9)/(x-2) , what is the value of x?