1) x10 = 7890 - 890x10 = 7000x = 700
2) 10000/x = 500*210000 = 1000xx = 10
3) x/10 = 18035 + 1965x/10 = 20000x = 200000
4) 100*x = 98000/10100x = 9800x = 98
Ответ: x = 700, x = 10, x = 200000, x = 98.
1) x10 = 7890 - 890
x10 = 7000
x = 700
2) 10000/x = 500*2
10000 = 1000x
x = 10
3) x/10 = 18035 + 1965
x/10 = 20000
x = 200000
4) 100*x = 98000/10
100x = 9800
x = 98
Ответ: x = 700, x = 10, x = 200000, x = 98.