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Algebra is always a bit confusing when you first learn is as it's the first time letters come into maths, here is the mainthing you should remember:

you have to do the same thing to both ...

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?

Fraction questions can confuse a lot of students when phrased in this way, a good place to start therefore is to think of the number 9 as the fraction 9/1.

Now we know the rule that when ...

KCL is Kirchoff Current Law, this law says the total current walk pass a node is always zero, it is just like a water supply system, if the whole apartment is considered as a node, the water that flow ...