GCSE Maths

Testing Simultaneous Equations

Now would be a good time for you to test what you have learned. Work out the value of each variable in the examples below:
  1. 2a + b = 21
    a + 2b = 24
  2. 5p + q = 100
    2p - q = -30
  3. m + n = 0
    6m - n = 49
Hints: Rearrange one equation to give you one variable. Substitute it, then solve. Be careful with minus signs!

When you have written down your answers, check them on the next page...

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