(3/5- 0,25)*х=4,9 (4-2 3/7)*х=2 5/14

(3/5-0,25)×х=4,9(0,6-0,25)×х=4,90,35х=4,9х=4,9÷0,35х=14(4-2 3/7)×х=2 5/14(3 7/7-2 3/7)×х=2 5/141 4/7х=2 5/14х=33/14÷11/7х=3/2х=1 1/2