Tìm x, biết: a) 4 1/2 - x = -3 2/3 b) x - 2 2/3 = 3 1/3

* Hướng dẫn giải

$a)4\frac{1}{2}-x=-3\frac{2}{3}\Rightarrow x=4\frac{1}{2}+3\frac{2}{3}=\frac{9}{2}+\frac{11}{3}=8\frac{1}{6}.$

$b)x-2\frac{2}{3}=3\frac{1}{3}\Rightarrow x=2\frac{2}{3}+3\frac{1}{3}=6$