9t +4t -286 = 0
9t + 4t = 286
13t = 286
t = 286 / 13
t = 22
14х + 9х + 88 = 272
23х = 272 - 88
23х = 184
х = 184 / 23
х = 8
25х -16х + 54 = 162
9х + 54 = 162
9х = 162 - 54
9х = 108
х = 108 / 9
х = 12
9t +4t -286 = 0
9t + 4t = 286
13t = 286
t = 286 / 13
t = 22
14х + 9х + 88 = 272
23х = 272 - 88
23х = 184
х = 184 / 23
х = 8
25х -16х + 54 = 162
9х + 54 = 162
9х = 162 - 54
9х = 108
х = 108 / 9
х = 12