Posted by Esther on Monday, October 26, 2009 at 7:42pm.
At a club play, 117 tickets were sold. Adults' tickets cost $1.25 and
children's tickets cost $0.75. In all, $129.75 was taken in. How many of
each kind of ticket were sold?
I don't know how to set up the equation.
1.25x + 0.75y=129.75
this is what I've done but it doesn't seem right!
- Math - Reiny, Monday, October 26, 2009 at 8:07pm
but you also know that x+y = 117 from which
y = 117-x
now plug that into your first equation and continue.
- Math - Esther, Monday, October 26, 2009 at 8:09pm
By process of elimination?
- Math - jim, Monday, October 26, 2009 at 8:17pm
More like substitution.
You already worked out the hard bit:
1.25x + 0.75y = 129.75
and Reiny pointed out that
y = 117-x
So you can replace (substitute) y in your equation:
1.25x + 0.75(117-x) = 129.75
and I'm sure you can see your way home from there.
- Math - Esther, Monday, October 26, 2009 at 8:17pm
Ok...I got it now, Thanks
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