Question 185614
10M+7F=424
M+F=52 OR M=52-F
NOW REPLACE M WITH (52-F) IN THE FIRST EQUATION & SOLVE FOR F.
10(52-F)+7F=424
520-10F+7F=424
-3F=424-520
-3F=-96
F=-96/-3
F=32 FRUIT PIES WERE SOLD.
52-32=20 MEAT PIES WERE SOLD.
PROOF:
10*20+7*32=424
200+224=424
424=424