2. Решите пропорции.

а) x/14 = 4/7, x = (4/7)*14 = 8.
б) x/6 = 98/21, x = (98/21)*6 = 28.
в) 45:5x = 9:4, 5x = 45*4/9, x = 20.
г) 4:2(2/7) = 5/8:x, x = (5/8)*(2+2/7)/4 = 35/56 = 5/8.