If 36: x :: x :63, find the value of x.

If 36: 81::X: 63, find the value of x.

If 12 x + 17 y = 53 and 17 x + 12 y = 63 then find the values of (x + y )

If the middle term in the binomial expansion of (1/x+xsinx)^(10) is equal to (63)/8, find the value of x.

If y = 2 x ^(3) + 3 x ^(2) - 36 x + 7 find the values of x for which (dy)/(dx) = 0

If the middle term in the binomial expansion of ((1)/(x)+x sin x^(10)) is equal to (63)/(8), find the value of x.

If 12x+9y=43 and 6x+7y=36 are the liner equation in x and y, then find the values of xand y.