Solve: f^-1(3) when f(x)=2x+3/5

Can these be explained/work shown for me please?

Question

Solve: f^-1(3) when f(x)=2x+3/5

Can these be explained/work shown for me please?

anonymous · Answer

3 = 2x+3/5--solve for x, so subtract 3/5 to both sides
3-3/5=2x---combine like terms 
12/5 = 2x --- divide both sides by 2 
6/5 = x

anonymous · Answer

So the final answer is 1.2?

anonymous · Answer

yeah

anonymous · Answer

Alright, thank you for explaining. I've been stuck on this for abit because of the negative power.

anonymous · Answer

f^-1(x) mean the inverse of the function

anonymous · Answer

Thank you very much ^^. Medal awarded and fanned.

anonymous · Answer

f(x) = 2x+3/5 is the original function 
f^-1(x) is asking you for the inverse of the function 
so if there are no given values for x, you need to find the inverse function 
but if there is a value for x, the easiest and fastest was to solve it what i did at the top

anonymous · Answer

No Problem :)