A linear equation is an algebraic equation in which each term has an exponent of one. It is called linear because it can be graphed as a straight line in the xy-plane. Since this is a fundamental topic it appears in many SAT questions.
Calculating an output of an expression requires calculating the value of an expression. In some questions we are given a word problem and in other questions we are given an equation that we must use it order to solve the expression.
Solving linear equations- In these questions we are given an equation and we are asked to solve it. Some questions may include fractions or absolute values.
Linear equations that don’t have one solution- In these questions we are asked to solve an equation that has no solution or an infinite number of solutions.
Creating and solving an equation from a word problem- In these questions we are given a word problem from which we need to write an equation and solve it.
The formula sheet for linear equations is listed below.