An equation is a mathematical expression that contains an equals symbol. Equations often contain algebra. Algebra is used in Maths when we do not know the exact number in a calculation - this unknown ...

An algebraic equation contains one or more letters in it. Each letter in the equation is called a variable. A variable can change in value. We guess at different values for each letter until our ...

If North Carolina high school junior Katie Denton struggles with her Algebra 2 homework, she knows she’s not on her own. Denton can use her school-issued smartphone to send instant messages to her ...