[DavidC]

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To solve for two variables you need two different equations. The different sides of the equal sign will always be equal so you want to end up with x = ? and y = ?.

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Cool.

x+y=100
x = 100-y

55x+18y = 33
55(100-y)+18y = 33
5500-55y+18y=33
5500-37y=33
-37y=-5467
37y=5467
y=5467/37
y=147%? crap! [img]/images/graemlins/smile.gif[/img]

I'm not having an easy time with this.

Edit: It's entirely possible that the answer is 14.7, since I did x+y=100... hmm..