Question

f(2x+4)=6x+13
Find f(5-3x)+(5x-1)

Answer 1

Let 2x+4=y
Then x=(y-4)/2
Hence f(2x+4)=6x+13
gives f(y)=6(y-4)/2+13=3(y-4)+13 =3y-12+13=3y+1

Answer 2

So f(x)=3x+1
Hence f(5-3x)=3(5-3x)+1=15-9x+1=16-9x
Therefore f(5-3x)+(5x-1)=16-9x+5x-1=15-4x.@Gwin

Answer 3

Can you please explain in words?

Answer 4

See we are not given f(x) right??.@Gwin

Answer 5

Oui

Answer 6

???

Answer 7

first we need to find f(x)

Answer 8

Okay

Answer 9

read the attachment and tell me what you figured out

Answer 10

You let y equal what is in the parenthesis and then plug it in to what you want to find, correct?

Answer 11

yeah, we want f(y) = something
Then by interchanging y by x we have f(x)

Answer 12

next??

Answer 13

@Gwin

Answer 14

Then solve for x and plug it into f(5-3x)+f(5x-1)

Answer 15

@Princer_Jones

Answer 16

Hi.@Gwin

Answer 17

OH it was f(5-3x)+f(5x-1)?? see you typed wrong the question you posted... Yeah thats it.

Answer 18

I seriously typed it wrong? @Princer_Jones

Answer 19

In your question it was
Find f(5-3x)+(5x-1)

Answer 20

@Gwin

Answer 21

Oh super.

Answer 22

@Princer_Jones

Answer 23

So you understood how to solve this kind of problems?.@Gwin

Answer 24

Sure @Princer_Jones
(I use this during Math Team Class, so that's like one out of eighty problems that are hard, confusing, or both.)