### Theory:

Solution to an equation:

Solution to an equation is the value that satisfies the equation.

Consider the equation $$x + 2 = 4$$.

 Value($$x$$) Equation($$x + 2 = 4$$) Equation satisfied or not? $$1$$ $$1 + 2 = 4$$ No $$2$$ $$2 + 2 = 4$$ Yes $$3$$ $$3 + 2 = 4$$ No $$4$$ $$4 + 2 = 4$$ No

From the above tabular column, it is understood that the equation $$x + 2 = 4$$ is satisfied only if '$$x$$' takes the value as $$2$$.

Therefore, the solution to the equation $$x + 2 = 4$$ is $$x = 2$$.