Answer: 40
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Notice how WI = 12 is one-third of IL = 36
So AM is going to be one-third of ML = 30 making AM = 10
AL = AM+ML = 10+30 = 40
AL = 40
Or a more formal way to do it is to use ratios
AL/ML = WL/IL
AL/ML = (WI+IL)/IL
AL/30 = (12+36)/36
AL/30 = 48/36
36*AL = 30*48
36*AL = 1440
AL = 1440/36
AL = 40
Either way we get the same answer