1) (13.9+259,1)*0.85-10х=100.1
раскроем скобки
11.815+220.235-10x = 100.1
-10x+131.95 = 0
10x-131.95 = 0
10x = 131.95
x = 13.195
3*(567,1-10.01)*10.01+1000х=51670
17030.013-300.6003+1000x = 51670
1000x-34940.5873 = 0
1000x = 34940.5873
x = 34.9405873
1) (13.9+259,1)*0.85-10х=100.1
раскроем скобки
11.815+220.235-10x = 100.1
-10x+131.95 = 0
10x-131.95 = 0
10x = 131.95
x = 13.195
3*(567,1-10.01)*10.01+1000х=51670
раскроем скобки
17030.013-300.6003+1000x = 51670
1000x-34940.5873 = 0
1000x = 34940.5873
x = 34.9405873