Mathematics, 16.03.2020 21:58 bandiadummy8595

Working alone and at a constant rate, Machine A takes 3 hours to create a widget. Machine B, working alone and at a constant rate, takes x hours to create a widget. Working together, Machine A and B take 12 hours to build two widgets. What is the value of x?

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Working alone and at a constant rate, Machine A takes 3 hours to create a widget. Machine B, working...