Glasses were sold at CVS. $12.00 for senior citizens and $14.50 for adults. There were 260 glasses sold for $3470 in total. How many total senior citizens glasses were sold?

Guest Mar 1, 2020

#1**+1 **

S= senior cit glasses revenue from = $12 S

A = adult glasses = 260 -S revenue from = ($ 14.50)(260-S) Summed = $ 3470

12S + 14.5(260-S) = 3470 Solve for 'S' the number of senior glasses sold

ElectricPavlov Mar 1, 2020

#2**+1 **

Lets suppose x = senior citizens and y = adults. So we create a system of equations:

\(12x+14.5y = 3470\)

\(x+y=260\)

Then we solve the system of equations:

\(12x+14.5y = 3470\)

\(12x+12y=3120\)

Then we subtract:

\(2.5y=350\)

Divide:

\(y=140\)

And then we can solve for x:

\(x=120\)

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.CCjump21 Mar 1, 2020