Area Important Formulas - Aptitude Questions and Answers

Linear equation

An equation involving only one unknown variable is called a linear equation.

Solution of a linear equation

The value of the unknown variable which when substituted, satisfies the given equation is called the solution of the equation.

Guide lines to solve Age problems

Read the problem carefully and denote the unknown age by some variable x.
Convert the statements of the problem step-by-step into mathematical equations, to the extent possible
Solve the equations for the unknown.
Check whether the obtained value of the variable satisfies the conditions given in the problem

Important Formulas