Identity for Addition
The identity for addition is zero. It works for all numbers and for the variables used in algebra.
More About Using Least Common Multiples
The least common multiple strategy reveals a system of equations that has not solution.
Multiplying Both Sides of an Equation by -1
By multiplying both side of an equation by negative one, you can change negative signs to positive, making an equation easier to work with.
Practical Problem: Finding Average Speed
Complex fractions often appear in formulas used to solve problems. A practical problem involving the rate, time, and distance formula illustrates working with complex fractions.
Practical Problem: Finding the Cost of a Taxi Ride
Writing an equation in slope-intercept form to solve a rate problem.
Examples of Slope-intercept Equations
Some examples of linear equations in slope-intercept form.
Identifying Linear Equations
How to identify a linear equation.
Problems Involving Exponents
How to multiply a monomial by itself.
Practical Algebraic Problem: Finding Total Earnings
An example of how to use a simple algebraic equation to determine total earnings from a part time job.
Table of Solutions for Equation with Two Variables
Constructing an equation with two variables and using a table to help solve it.