Learn how to solve a system of equations by substitution. To solve a system of equations means to obtain a common value of ...

Learn how to solve two step linear equations. A linear equation is an equation whose highest exponent on its variable(s) is 1 ...

Make sure you are confident in calculating with negative numbers, which is a skill often needed to solve equations. To solve the equation, do the inverse operation. The inverse of multiplying by 12 is ...