Question

Please help asap, I need this done in 10 mins

Answer 1

`-(4)/(3)` or
`-1(1)/(3)`

Explanation:

I could be 100% wrong ( I solved the problem the way it looks like it should be, but I don't recognize this way of writing one of these) but here we go:

`f(x)=(7x+1)/(3)-(4x-5)/(3) \\f(x)-x=(7x+1)/(3)-(4x-5)/(3)-x \\=(7x+1)/(3)+(-4x+5)/(3)-x \\=(3x-6)/(3)-(3x)/(3)\\ =-(6)/(3)=-2`

A little explanation:

Consider that f(x) is equal to what they tell you it is. With that in mind, f(x)-x would most likely be what they told you f(x) was with a "-x" slapped onto it.

Also:

`(3x)/(3)=x` because any number divided by itself is one so 3/3=1 and 3x/3=1x=x

Hope I could help :)

Answer 2

f(x) - x = 2

Explanation:

`f(x)-x\\\\=(7x+1)/(3)-(4x-5)/(3)-x\\\\=(7x+1)/(3)-(4x-5)/(3)-(3x)/(3)`

`=((7x+1)-(4x-5)-3x)/(3)\\\\=(7x+1-4x+5-3x)/(3)\\\\=(6)/(3)\\\\=2`