How do you solve simultaneous equations?
A simultaneous equation is when we have 2 equations which both have X and Y in them. The best way to solve these equations is to rearrange one of them to make either X or Y the subject, and then substitute it into the other equation. This gives you an equation with just one of X and Y in it which you can easily solve by expanding brackets and rearranging. This will tell you what either X or Y is equal to, which can then be substituted back into one of the starting equations to find the other term.
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Related Maths GCSE answers
All answers ▸Make a the subject of the following equation, p=(3a+5)/(4-a)
How do I expand brackets by multiplication?
y = x^2 + 4x + 7 Find the turning point of the equation by completing the square.
(b) In 2013, the price for each unit of electricity was 13.5 cents. Over the next 3 years, this price increased exponentially at a rate of 8% per year. Calculate the price for each unit of electricity after 3 years