x*2+28=100
2х = 100 - 28
2х = 72
х = 36
12*х - 368 = 316
12х = 316 + 368
12х = 684
х = 57
321 - х*3 = 96
-3х = 96 - 321
- 3х = -225
х = 75
х = 17*19 + 378
х = 701
x*2+28=100
2х = 100 - 28
2х = 72
х = 36
12*х - 368 = 316
12х = 316 + 368
12х = 684
х = 57
321 - х*3 = 96
-3х = 96 - 321
- 3х = -225
х = 75
х = 17*19 + 378
х = 701