# Math

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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!

• Math -

but you also know that x+y = 117 from which
y = 117-x

now plug that into your first equation and continue.

• Math -

By process of elimination?

• Math -

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 -

Ok...I got it now, Thanks

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