Могу только одно извини времени нет, 64-x=91:7
64-x=13
X=64-13
X=51
64-51=91:7
13=13
1. 64 - x = 13
x = 64 - 13
x = 51
2. 600 - x = 401
x = 600 - 401
x = 199
3. 4980 - x = 2010
x = 4980 - 2010
x = 2970
4. 45 - x = 18
x = 45 - 18
x = 27
5. 600 - x = 9
x = 600 - 9
x = 591
6. 76854 - x = 3000
x = 76854 = 3000
x = 73854
7. 14000 - x = 68 * 9
x = 14000 - 612
x = 13388
8. 604 - x = 210
x = 604 - 210
x = 394
9. 703 - x = 675
x = 703 - 675
x = 28
10. 879 - x = 696
x = 879 - 696
x = 183
