If `(1)/(3)x+5=8`, then `x=`?

If 8(2x-5)-6(3x-7)=1 then x= ?

If x-(1)/(x)=5,xne0 then what is the value of (x^(6)+3x^(3)-1)/(x^(6)-8x^(3)-1) ?

If 3x+(1)/(2x)=5 then what is the value of 27x^(3)+(1)/(8x^(3)) ?

If (5x + 1)^3 + (x - 3)^3 + 8(3x - 4)^3 =6 (5x + 1)(x- 3)(3x- 4) , then x is equal to:

if (5x)/(4) + (3x)/(8) gt (39)/(8) " and " (2x-1)/(12)-(x-1)/(3)lt(3x+1)/(4) , then x belongs to the internal

if (5x)/(4) + (3x)/(8) gt (39)/(8) " and " (2x-1)/(12)-(x-1)/(3)lt(3x+1)/(4) , then x belongs to the internal