Tìm x biết : a) \(\frac{2}{3}.x + \frac{1}{2} = \frac{1}\); b) \[\left( {4\frac{1}{2} - 2x} \right).1\frac{4} = 6\frac{1}{2}\] c) x – 83%.x = –1,7.

Tìm x biết :

a) \(\frac{2}{3}.x + \frac{1}{2} = \frac{1}\);

b) \[\left( {4\frac{1}{2} - 2x} \right).1\frac{4} = 6\frac{1}{2}\]

c) x – 83%.x = –1,7.