Question 1170705
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<pre>

Let x be the number of coffee.

Then the number of bagels is (x+4).


You write the total cost equation


    0.99*(x+4) + 1.29x = 10.80.


From the equation, you get


    x = {{{(10.80-0.99*4)/(1.29+0.99)}}} = 3.


<U>ANSWER</U>.  3 coffee and 3+4 = 7 bagels.
</pre>

Solved.



Enjoy &nbsp;&nbsp;&nbsp;&nbsp;// &nbsp;&nbsp;with virtual coffee and bagels (!)