1) x:100 = 0,81 + 0,09x = 0,81100 + 0,09100x = 81 + 9x = 90
2) x:1000 = 2,149 - 1,234x = 2,1491000 - 1,2341000x = 2149 - 1234x = 915
Ответ: x = 90; x = 915.
1) x:100 = 0,81 + 0,09
x = 0,81100 + 0,09100
x = 81 + 9
x = 90
2) x:1000 = 2,149 - 1,234
x = 2,1491000 - 1,2341000
x = 2149 - 1234
x = 915
Ответ: x = 90; x = 915.