An equation is like a math sentence that tells us 2 expressions are equal. A variable is a letter used to represent an unknown value. In the equation *x*+2=3, *x* is the variable. A constant is a known value or a number unattached to a variable. In the previous equation, 2 is a constant. A coefficient is a number multiplied by a variable. In the equation 3x=18, 3 is the coefficient. To solve an equation or inequality, you must isolate the variable (get it all by itself). You “undo” operations by applying opposite operations. The = sign tells us that both sides of an equation are equal. Therefore, both sides must remain balanced. If I add 6 to one side, I must add 6 to the other side. If I divide one side by 2, I must divide the other side by 2 as well.

### One-Step Equations

Algebra Four-choose one-step problems

Model Algebra-choose 1-step equations

Solve 1-Step Equations Battleship

### Two-Step Equations

AX+B=C (with decimals) Cruncher

### Distributive Property

Distributive Property Enrichment

Distributive Property Practice

Quia Distributive Property Battleship-limited practice items without membership

IXL Distributive Property-limited practice items without membership

Combining Like Terms & Distributive Property Jeopardy

Distributive Property Tutorial & Practice

### Combining Like Terms

### Virtual Tools

Distribute & Combine Like Terms Links