Finding x from function - symbolics

Hi, I'm looking for a command to find x from my function (it's a bit long function but i'm writing an example): y=ax+b (for example), and i wanna transform it to expression: x=... by command (I mean determination x from this equation). It's all symbolics. Please, help me!

Answer 1

[Star Strider]

Use the solve function. Note that since your function is longer than your example (and we do not know what it is), it may not have an analytic solution in x.

[kamil oster]

Everything would be OK, but when i use this function for y=ax+b i get -b/a. And i don't wanna lose y. I'm trying to find the command to transform y=ax+b to x=y-b/a.

[Walter Roberson]

syms x a b
y = a*x+b;
solve(y, x)

[Star Strider]

Thank you, Walter.