Simple question on using and specifying equations

Hi,

What I'm trying to do is simply solve an equation multiple times. By which I mean substitute the letters for numbers.

So I define my equation: syms x y = (3*x) + 5

Then I want to solve it by calling y and entering a value or an array of x values. Something like:

solve(y,10) or solve(y,x=10) or y(x=10) or y(10)

To solve the equation y for a value of x equal to 10, and return the answer of 35.

It must be very simple.

What I don't want to do is y = (3*10) + 5, because I want to define the equation once at the start of my code and then call it multiple times afterwards. So I can quickly investigate the effect of using different equations.

thanks in advance.

Greg

Answer 1

[Azzi Abdelmalek]

syms x
y = 3*x + 5
out1=subs(y,10)  % The result is a sym class
out2=double(out1) % the result is double

[Gregory]

Thank you, that worked perfectly!

Answer 2

[Andrei Bobrov]

>> y = @(x)3*x+5;
>> y(10)
ans =
    35