How to solve linear equations .. some of them you'll solve without really thinking about! Suppose you bought a CD for £8 and then two books at the same price. The total cost is £25 and, with a little bit of arithmetic, you might work out the price of each book is £8.50. Mathematicians like to call these "linear equations" and they look something like: 2B + 8 = 25 (where 'B' … [Read more...]