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 a) 3x + 5y =  26  

b) 2x + 2y = 12

Step One: We need to find a way to equate either the x terms of the y terms in each equation. Multiply equation a) by 2 ...

(1) 2x - 5y = 11(2) 3x + 2y = 7-----------------------Multiply equation (1) by 3 & Multiply equation (2) by 2 to give equal values for x:(3) 6x - 15y = 33(4) 6x + 4y = 14-----------------------Take eq...

We know that a straight line has a general formula: y = mx+c, where m is the gradient of the line and c is the y-intercept; so, we are looking to find m and c. 

The line passes through th...

This question involves factorising then simplifying an equation. Start with the original equation:(x-1)² - (x-1) Take out a factor of (x-1)(x-1)(x-1-1)Simplify(x-1)(x-2) 

Here is a question from the 2015 edexcel GCSE paper that was considered particulary challenging. 

There are n sweets in a bag. 6 of the sweets are orange. The rest of the sweets a...