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How do you solve simultaneous equations

So let's use 2x + 5y = 11 and 3x - 5y = 4 as our example.In these equations we have 2 unknown variables, x and y which we are trying to work out. The numbers in-front of the letters are the amount of time...

Answered by Siobhan C. • Maths tutor

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Megan buys a car for £7,700 plus 20% VAT. She pays a deposit for the car and then pays the rest in 12 equal instalments of £642.50. How much did Megan pay as a deposit?

7700 x 1.2 = 9240 (total cost of car)12 x 642.5 = 7710 (total cost of instalments)9240 - 7710 = 1530Answer = £1,530

Answered by Charles D. • Maths tutor

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There are some people in a cinema. 3/5 of the people in the cinema are children. For the children in the cinema, number of girls:number of boys = 2:7. There are 170 girls in the cinema. Work out the number of adults in the cinema.

We can begin by working out the total number of children in the cinema. We know that for every 2 girls, there are 7 boys, which is the same as saying for every 1 girl, there are 3.5 boys. Three and a half...

Answered by Tayla B. • Maths tutor

21449 Views

Anna and James share out £40 in the ratio 5:3 in that order. How much do they each get?

1st Find the total number of parts they will be splitting the £50 into. If Anna is getting 5 parts and James is getting 3 how many parts in total? 5 + 3 = 8 2nd Work out how much each part is worth. To do...

Answered by Rebecca K. • Maths tutor

11209 Views

Many students do not understand the rules for when one can 'cancel' in regards to fractions

The first step is to assess whether there are any plus or minus signs anywhere within the fraction. If not: separate the denominator into brackets, for instance if the denominator contained 2x you would s...

Answered by Anna C. • Maths tutor

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