Question

for f(x)= 5 over x-7 when will. f(x) equal 8?

Answer 1

Answer:

Therefore at

$x=\dfrac{1}{3}$

we have

$f(x)=8$

Step-by-step explanation:

Given:

$f(x)=\dfrac{5}{x}-7$

To Find:

x = ? when f(x) = 8

Solution:

$f(x)=\dfrac{5}{x}-7$ ..............Given

Substituting f(x) = 8 we get

$8=\dfrac{5}{x}-7$

Adding 7 to both the side

$8+7=\dfrac{5}{x}-7+7$

$15=\dfrac{5}{x}$

$x=\dfrac{5}{15}=\dfrac{1}{3}$

Therefore at

$x=\dfrac{1}{3}$

we have

$f(x)=8$