Select all equations that can result from adding these two equations or subtracting one from the other. {x+y=12 3x−5y=4

A. 2x−4y=8
B. -2x+6y=8
C. 4x−4y=16
D. 4x+4y=16
F. 2x−6y=-8
G. 5x−4y=28

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