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y=3x (1)

2x+y = 5 (2)

Here we are being asked to find what the value of x and y is. It is asking us to substitute either x or y into the equation to help us find our solutio...

In order to simplify the problem, I will solve it without using fractions.

First,  we should find the least common multiple(LCM) of the days needed for Jack and Richard to paint a house. ...

To work out averages we add up all of the ages and divide by the number of people in the group.

So that means in the first group, before the new person joined in, all the ages added up an...

23  35  47  59  ?First we need to find the pattern in the sequence. We can do this by working out the gaps between the numbers. To work out the gap, we subtract each number from the next one in the sequen...

Jodie works for a bookshop, she is paid £6.50 an hour plus 5% of the cost of each book she sells. On Saturday she worked for 3 hours and sold £220 worth of books. How much did she earn on saturday?