600 Have you no calculator?
I suggest you purchase one very soon.
I, however, worked this out mentally. Have a good day.
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600
3/8 x 40 = 15
15x28x40=16,800
10 - 3x = x - 2x + 40 10 - 3x = - x + 40 10 - 40 = 3x - x -30 = 2x -15 = x
If the numbers are x and y then x + y = 40 x - y = 10 so x = 25, y = 15 Then LCM(x, y) = LCM(25, 15) = 75