Solving algebraic equations without using symbolic variables

How do you solve an algebraic equation like x+y=2 for x without using symbolic variables - for example by defining a function handle y = 1; f = @(x) x+y and setting it equal to 2? Y's value is known so only x needs to be found.

[David Hill]

Your question is trival. I have a hard time understanding your question.

y=1;
x=2-y;%x==1

[Aleem Andrew]

It's not trivial simply because you can't understand it and besides that's just an example.

Answer 1

[Steven Lord]

For one equation in one unknown, use fzero.

y = 1;
f = @(x) x + y;
initialGuess = 42;

% Find a zero of f(x) - 2 = 0 which is equivalent to f(x) = 2
x = fzero(@(x) f(x) - 2, initialGuess)

x = 1

check = f(x) % Should be close to 2

check = 2