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SIMULTANEOUS EQUATIONS!

How to work them out:

Easy (1) 5x +5y =10
(2) 5x+ 3y = 8

1) Take away the x's
2) Then take away the 3y from 5y and 8 from 10.

5y ­ 3y = 2y
10 ­ 8 = 2

Then you have:

2y = 2…

Page 2

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SIMULTANEOUS EQUATIONS!

Hard
(1) 10x + 2y = 20
(2) 5x + 3y = 15

Because the two equations do not have any of the same numbers you have to times one of
the equations (either (1) or (2)) to make one of its values equal to the other:

(2)X…

Page 3

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SIMULTANEOUS EQUATIONS!

Opposite Signs
(1) 3x + 6y = 18
(2) 5x ­ 6y = 22

Because the signs are different, you have to add, and so this cancels out the 6y

8x = 40
X = 5

Once again simply substitute the x value into one equation (either (1)…

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