Question

if x minus 1 by 3 is equal to 3 find the value of x cube minus 1 by x cube

Answer 1

x-1/3=3
x-1/3=3
x-1=9
x=10

Answer 2

( x - 1 ) / 3 = 3

Bring 3 from denominator to the right side we get,

( x - 1 ) = 3 * 3

=> ( x - 1 ) = 9

=> x = 9 + 1 = 10

Hence x = 10

Now we must find what is the value of ( x³ - 1 ) / x³

So substituting x = 10 in the above equation we get,

=> ( 10³ + 1 ) / 10

=> 1000 - 1 / 10

=> 999 / 10

=> 99.9

Hence ( x³ - 1 ) / x³ = 99.9

Hope it helped !