An equation is used to show two expressions that are equal to each other.

Solving two step linear equations

Maths

In this unit, pupils learn how to rearrange an equation to find a specific value that satisfies the equation. In expressions and formulae, pupils use their understanding of rearrangement to change the subject of a formula.

In the prior unit, pupils saw that an arithmetic sequence can be represented graphically and that this is a linear relationship. Any point on the line satisfies this relationship. In this unit, pupils learn how to find a value that satisfies the relationship when the second value is known, without the aid of the graph.

Solving linear equations

The solution to an equation is the value which, when substituted, maintains the {{}} between the two expressions.

Which is the most useful additive first step to apply to both sides when solving $$7y − 3=18$$?

Which is the most useful multiplicative first step to apply to both sides when solving $$6y−12=18$$?

$$x=$${{}} is the solution to the equation $${x\over8}+{1\over4}={1\over2}$$

An equation is used to show two expressions that are {{}} to each other.

It can't be solved because $$7$$ is not divisible by $$3$$

This lesson will soon be taken down.

Solving two step linear equations

Lesson outcome