Math
posted by Esther on .
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.
Work Done
Is it:
1.25x + 0.75y=129.75
this is what I've done but it doesn't seem right!

but you also know that x+y = 117 from which
y = 117x
now plug that into your first equation and continue. 
By process of elimination?

More like substitution.
You already worked out the hard bit:
1.25x + 0.75y = 129.75
and Reiny pointed out that
y = 117x
So you can replace (substitute) y in your equation:
1.25x + 0.75(117x) = 129.75
and I'm sure you can see your way home from there. 
Ok...I got it now, Thanks