(7х + 139) : 13 = 15
7х + 139 = 15 * 13
7х + 139 = 195
7х = 195 - 139
7х = 56
х = 56 : 7
х = 8
5 + 294/х+8 = 26
5 * (х + 8) + 294
--------------------- = 26
х + 8
5х + 40 + 294
------------------ = 26
х + 8
5х + 334
------------- = 26
х + 8
5х + 334 = 26 * (х + 8)
5х + 334 = 26х + 208
26х - 5х = 334 - 208
21х = 126
х = 126 : 21
х = 6
413 - х
---------- + 27 = 60
12
413 - х + 27 * 12
---------------------- = 60
12
413 - х + 324
------------------- = 60
12
737 - х
----------- = 60
12
737 - х = 60 * 12
737 - х = 720
х = 737 - 720
х = 17
41 - (216 - 3х)/34 = 35
41 * 34 - (216 - 3х)
-------------------------- = 35
34
1394 - (216 - 3х)
----------------------- = 35
34
1394 - 216 + 3х
----------------------- = 35
34
1178 + 3х = 35 * 34
1178 + 3х = 1190
3х = 1190 - 1178
3х = 12
х = 12 : 3
х = 4