1 (4n+3n)*11=154
раскроем скобки
44n+33n = 154
77n-154 = 0
77n = 154
n = 2
2 (19n+6n):4=26
13n=26*4
13n=104
n=104:13
n=8
3 (17n-8n)*13=351
9n=351:13
9n=27
n=27/9
n=3
1 (4n+3n)*11=154
раскроем скобки
44n+33n = 154
77n-154 = 0
77n = 154
n = 2
2 (19n+6n):4=26
13n=26*4
13n=104
n=104:13
n=8
3 (17n-8n)*13=351
9n=351:13
9n=27
n=27/9
n=3