Posted by sheryl on Tuesday, July 22, 2008 at 3:06am.
Your teacher should have given you what X= alternativly what Y= then you should work out what either X or Y stands for. Take your first equation for example..
Q. IF X EQUALS 2 WHAT IS Y?
Substitute x with four
Now times 2 by the number in the brackets
so the equation now reads
in this case
remember this is just an example! Insert the value of Y or X into your equations and work it out!
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