Answer:
7 pens
Step-by-step explanation:
Anthony spent $6.25 buying 11 pens and pencils, where the pens cost $0.75 each and the pencils were $0.25. You want to know the number of pens Anthony bought.
Setup
Let x represent the number of pens Anthony bought. Then 11-x is the number of pencils, and Anthony's total expenditure was ...
0.75x +0.25(11 -x) = 6.25
Solution
Simplifying the equation gives ...
0.50x +2.75 = 6.25
0.50x = 3.50 . . . . . . . . subtract 2.75
x = 7 . . . . . . . . . . . . . divide by 0.50
Anthony bought 7 pens.
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Additional comment
Anthony also bought 4 pencils.
