Did you know?

We also have Bitesize study guides covering many subjects at National 4 and National 5 on our Knowledge & Learning BETA website.

Home > Maths I > Relationships > Formulae

Maths I

Formulae

Next

Forming an equation

Example

Look at the following worked example.

Anwar, Ben and Colin all collect foreign coins.

Anwar has three times as many coins as Ben.

Colin has coins more than Ben.

Ben has coins.

Write down, in terms of , the number of coins Anwar has and the number of coins Colin has.

Anwar has ( times )

Colin has ( more than Ben)

If the three boys have coins altogether, write down an equation and solve it for .

Therefore,

is the equation.

Write down the number of coins each boy has.

Ben has , Anwar has and Colin has (Check equals ).

Now try the following questions using the information given below.

Question

Three sisters, Ria, Sara and Tara are saving for a holiday.

Sara has twice as much money as Ria.

Tara has less than Ria.

Ria has.

Write down in terms of how much money Sara has and how much money Tara has.

Sara has and Tara has

Question

The three girls have altogether.

Write down an equation and solve it for .

,

Therefore,

, ,

Question

Write down how much money each girl has.