UNIT+3+Chapter+4+Linear+Equations

Chapter 4 Linear Equations

Aim of this chapter - to be able to solve any linear equation, including being able to form an equation to represent a real life problem.

10th September - 12th September

We've been looking at all the 'issues' you may have to face when solving a linear equation.

i) The answer doesn't have to be a positive integer. That's fine - just double check your working and, if you have time, check your answer works by substituting it back into the original equation. You have access to a calculator in the exam so this is a useful skill.

ii) If an equation has 'letters on both sides' you need to 'get rid of them' from one side (do this by adding or subtracting)

iii) If an equation contains brackets you can 'get rid of them' by expanding. (NB there is sometimes a quicker way - feel free to take a short cut if you like)

(iv) If an equation contains fractions you can 'get rid of them' by multiplying through by the denominators. Please be careful doing this!

Whenever you solve an equation...

Start by writing out the equation. Show each line of your working - deal with brackets, fractions, letters on both side if necessary. Try to keep your equals signs in line. CHECK YOUR ANSWER (use a calculator if you like - sometimes using the ANS button will make this easier)

HOMEWORK SHEET IS DUE NEXT TUESDAY (18th) - IT IS AVAILABLE THROUGH THE SCHOOL MATHS WEBSITE IN MY FOLDER.