Tìm x biết a) x : 2,2 = (28,7 – 13,5).2; b) \(\frac{1}{2}x + \frac{2}{3}(x - 1) = \frac{1}{3}\); c) \(\frac{2}{3}x:\frac{1}{5} = 1\frac{1}{3}:25\% \); d) \(0,5 - \left( {50\% - \frac{3}{5}x} \right) = 2\frac{1}{2}\)

Tìm x biết

a) x : 2,2 = (28,7 – 13,5).2;

b) \(\frac{1}{2}x + \frac{2}{3}(x - 1) = \frac{1}{3}\);

c) \(\frac{2}{3}x:\frac{1}{5} = 1\frac{1}{3}:25\% \);

d) \(0,5 - \left( {50\% - \frac{3}{5}x} \right) = 2\frac{1}{2}\)