Algebra Help

[sharp sparrow]

Help on this please

[tepid anchor]

1. Wait patiently for a helper to come along.
2. Once someone helps you, say thank you and close the thread with:

+close

3. Feel free to nominate the person for helper of the week in #helper-nominations
4. Do not ping the mods, unless someone is breaking the rules.
5. If you're happy with the help you got here, and the server overall, you can contribute financially as well:

[rancid gale]

well

f(x) you can even rewrite as y

so just do y=(21-6x)/5

then swap y and x

so its

x=(21-6y)/5

then rearrange for y

[sharp sparrow]

im

a bit

confused

still

😭

[cloud merlin]

did you get it

[weary cape]

so an inverse function can simply be found by
first replacing f(x) with y
for example f(x)=3x+5 turns into y=3x+5

now replace all instances of x with y and vice versa

to get

x=3y+5

and you need to isolate y

so here i would move the 5 over

x-5=3y

finally divide 3 getting

$\frac x3-\frac53 = y$

[white spire]

!𒐪 ɹɐupoɯ⇂ㄥ8𝟝 𒐪!

[cloud merlin]

yeah @weary cape got it