UNIT OVERVIEW

This unit teaches you how to find unknown values in mathematical problems. When you ask "how much do I need?" or "what's the missing piece?", you are thinking about equations.

Equation: A mathematical statement where two expressions are equal, and you solve to find the unknown value.

Inequality: A mathematical statement where one expression is greater or less than another, giving a range of possible solutions.

In this unit, you will learn to:

• Solve linear equations and check your solutions
• Factorise and solve quadratic equations (equations with $x^2$)
• Solve simultaneous equations (finding two unknowns at once)
• Turn word problems into equations
• Rearrange literal equations (change the subject of a formula)
• Solve linear inequalities and show solutions on number lines and in interval notation

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