Welp, it's a secret, if I told you, I'd have to kill you.
Answer:that will be c 60
Step-by-step explanation: Because 12/4 but than the machines turn to 20 so 4x5 equals 20 so you got to do it to both sides
12x5=60 so its 60 men to run 20 machines
Y-70
X-30
Z-80
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