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simultaneous equations - 2x + y = 7 and 3x -y = 8

there are a few main ways to solve simultaneous equations: find an equal like term. In this case y and add or subtract the two equations together to isolate one of x or y. Another way of solving simultaneous...
JM
Answered by Josh M. • Maths tutor
6594 Views

What is the value of x if x^2 - 3x +2=0?

This question can be difficult to see where to start, but can be quite easily solved once you realise what you have to do Firstly, let ax 2 + bx + c =0. If this is also true, a=1, b= -3, and c=2. Firstly, fi...
CS
Answered by Charlotte S. • Maths tutor
3636 Views

Make X the subject of the equation (9x-7)/3 = 8y

To start solving a question like this you want to do it in a set of steps: Step 1: Get rid of the division. To do thsi you need to do the opposite function. The opposite of division is multiplication so you ...
RW
Answered by Ruth W. • Maths tutor
5881 Views

Rearrange the following, making c the subject: (3c + b)/2 = c + a

Rearranging is one of the trickier topics in GCSE maths, however as long as you follow it through step by step you shouldn't have a problem. The question asks you to make 'c' the subject. This means you need...
OC
Answered by Olivia C. • Maths tutor
16472 Views

Sam uses 140g of flour to make 12 cakes. How much flour will Sam need to make 21 cakes?

This question can be difficult, because it involve a lot of words. This can make it confusing as to what information we really need to use - just work it through step by step. Sam uses 140g of flour to make ...
OC
Answered by Olivia C. • Maths tutor
12399 Views