Answer:
F=full page H=half page
40H+75F=800
H+F=13 so H= 13-F substitute 13-F for H in the first equation.
40(13-F)+75F=800
520-40F +75F=800
35F= 280 so F=280/35=8
8 fullpage and 5 halfpage ads
Explanation:
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