5500-x=3939
х=5500-3939
х= 1561
5500-1561=3939
3939=3939
m:9=81810
m=81810*9
m= 736290
736290:9=81810
81810=81810
1) 5500-x = 3939
x = 5500-3939
x = 1561
Пр.: 5500 - 1561 = 3939
2) m : 9 = 81810
m = 81810*9
m = 736290
Пр.: 736290 : 9 = 81810
5500-x=3939
х=5500-3939
х= 1561
5500-1561=3939
3939=3939
m:9=81810
m=81810*9
m= 736290
736290:9=81810
81810=81810
1) 5500-x = 3939
x = 5500-3939
x = 1561
Пр.: 5500 - 1561 = 3939
2) m : 9 = 81810
m = 81810*9
m = 736290
Пр.: 736290 : 9 = 81810