Answer:
Marcus picked 17 apples
Peter picked 29 apples
Burt picked 58 apples.
Step-by-step explanation:
Peter = P
Marcus = M
Burt = B
104 = P + B + M
P = M+12
104 = M + 12 + B + M
104 = 2M + B + 12
B = 2(P)
B = 2(M+12)
104 = 2M + 2(M+12) + 12
104 = 2M + 2M + 24 + 12
104 = 4m + 36
68 = 4m
17 = m
Marcus picked 17 apples.
Peter picked 29 apples. (17+12)
Burt picked 58 apples (29*2)
sorry if this is confusing.
goodluck on your schoolwork/homework!
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sorry for any bad explanations or incorrect answers.