Solve

Solve[expr, vars] attempts to solve the system expr of equations or inequalities for the variables vars.

Solve[expr, vars, dom] solves over the domain dom. Common choices are Reals, Integers, and Complexes.

Examples

Solve a linear equation:

Solve[x + 2 == 5, x]
(* {{x -> 3}} *)

Solve a quadratic equation:

Solve[x^2 - 4 == 0, x]
(* {{x -> -2}, {x -> 2}} *)

Solve a system of equations:

Solve[{x + y == 3, x - y == 1}, {x, y}]
(* {{x -> 2, y -> 1}} *)

Please visit the official Wolfram Language Reference for more details.