There are 30 students in a class. The number of men is the same as one half the number of woman. Find the number of men and woman. So x + 1/2(x) = 30 Then the example skips to 3/2(x) = 30 What made it go from 1/2 to 3/2?
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You can write x as 2x/2 and since you have the same denominators you may add them: 2x/2 + x/2 = (2+1)x/2 = 3x/2 Or, what is 1+0.5
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