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maths

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solve the following simultaneous equation:

5x+2y=29
x-y=-4

2x-y=-1
3x-y=2

5x+y=16
x-2y=1

5x+2y=16
-3x+4y=-7

3x+2y=19
5x-2y=5

7x-1/3-2(7y+3)/5=10/3

5x+2/4+3y-2/5=16/5

  • maths -

    I'll show you how to do the first oner. You try the others using the same method.

    5x +2y = 29
    x - y = -4

    Double the last equation (both sides)
    2x -2y = -8

    Add the first and third equations.

    7x = 21

    x = 3

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