х - 56 * 2 = 850
х - 112 = 850
х = 850 + 112
х = 962
962 - 56 * 2 = 850
962 - 112 = 850
850 = 850
748 + 205 + х = 2 000
953 + х = 2 000
х = 2 000 - 953
х = 1 047
748 + 205 + 1 047 = 2 000
953 + 1 047 = 2 000
2 000 = 2 000
х + 89 * 3 = 748
х + 267 = 748
х = 748 - 267
х = 481
481 + 89 * 3 = 748
481 + 267 = 748
748 = 748
2 * х + 1 457 = 10 267
2 * х = 10 267 - 1 457
2 * х = 8 810
х = 8 810 : 2
х = 4 405
2 * 4 405 + 1 457 = 10 267
8 810 + 1 457 = 10 267
10 267 = 10 267
15/2:9/2 = x : 3/25
15/2*2/9 = x : 3/25
5/3=x : 3/25
х=5/3*3/25=5/25=1/5=0,2