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3 Stacks of coins - A B CAltogether the stacks add up to 130 pence (let's work in pence so its not too confusing). So, A+B+C=130pStack B has 3 times as much money has Stack A. So B = 3A...

A set of simultaneous equations most commonly represents two lines on a graph, or perhaps a circle, with a line running through it. When you solve a set of simultaneous equations, its important to remembe...