For solving an equation, we transpose all the terms containing the variable to the $LHS$ and all the constants to the $RHS$.

The solution to an equation cannot be negative.

Only one number line can be used for representing the solution of one inequation.

Solutions can be verified by substituting them in the equation.

Transposition is used for solving inequations also.

When every term of an inequation changes sign then the inequality changes direction.

If $x$ is an even number, then the next lower even number is _____.