Learn the language of algebra: variables, expressions, equations, and functions. Build problem-solving skills that form the foundation for all higher mathematics.
What you’ll learn
A variable keeps a changing number in the rule so one expression can cover many cases, such as C=5x+20 for any data usage
Evaluating means substitute, then follow order of operations; write the substitution before you simplify
One-step equations need one inverse operation on both sides; always check in the original equation
Two-step equations undo addition or subtraction first, then multiplication or division
The distributive property a(b+c)=ab+ac expands a shared factor so you can solve with moves you already know
Slope-intercept form y=mx+b names the steepness m and the starting height b; the phone-plan story is the same shape