simplify: 1/3 - (x-2)/3 (1-2)/3 - x -(1/3) - x I get -x-(1/3) but the online example states it should be (-x + 3)/3 is this correct and why?
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They are correct. Since you have common denominators, you can combine numerators. You'll get $\displaystyle \frac{1-(x-2)}{3}$ After distributing the negative, you'll have 1 - x + 2 in the numerator.
excellent explanation - thanks.
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