Question

if 3x-4/x=4 find 27x3-64/x3

Answer 1

$\huge\mathtt\red{Answer}$

$→\frac{3x - 4}{x} = 4$

$→3x - 4 = 4x$

$→ - 4 = 4x - 3x$

$→ - 4 = - x$

$→x = 4$

Now putting the value of x in the given equation, we get,

$→\frac{27 {x}^{3} - 64 }{ {x}^{3} }$

$→\frac{27 \times {4}^{3} - 64}{ {4}^{3} }$

$→ \frac{1728 - 64}{64}$

$→ \frac{1664}{64}$

$→26$