Less than mean subtracting
3/9 = 0.3333333336 ~ 0.333
Answer:
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Set up and solve an equation:
3(90-x) = (180-x). Then 270 - 3x = 180 - x, or 270 - 180 = 2x.
90 = 2x, so x = 45 deg.
Is this true? 3(90-45) = (180-45)? If so, x = 45 degrees is correct.
Subtract 18 from 72 to get Michelle's current age.
72 - 18 = 54