Algebra

Linear equations and simple algebraic problems.

General Test5 questions

What to know

Linear equations in one and two variables, simple identities ((a + b)² = a² + 2ab + b², (a − b)², a² − b² = (a + b)(a − b)), substitution, and word problems turned into equations.

Practice questions

If 3x + 5 = 20, then x =	Easy
If a + b = 7 and ab = 12, then a² + b² =	Medium
The sum of two numbers is 30 and their difference is 6. The larger number is:	Easy
Simplify: (x + 3)(x − 3)	Easy
A father is three times as old as his son. In 10 years he will be twice as old. What is the son’s present age?	Medium

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