Write your own real-world percent problem i need help i cant think of one

Can someone explain to me how to do

Jake bakes and sell apple pies. he sells each pie for $5.75 . the materials to make the pies cost $40. the boxes jake puts the pies in cost & 12.50 total. how many pies does jake need to sell to earn a profit of $50

Which ordered pair is a solution of the equation? 2x+3y=10