X=317
a=427
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Ответ : 138
сначала делаем умножение : 64+110-36=138
100%-40 р
Х% - 8 р
10% это 4 рубля
20% это 8 рублей
ну или
40/8=5 в 5 раз больше
100/5=20% от стоимости билета
Все просто
1)5х+6х=11х
11х=2211
х=2211/11
х=201
2)23х+х=38+10
24х=48
х=48/24
х=2
3)на мой взгляд, не очень корректно написано
4)1,5х-0,2х+1,4х=291,6
2,7х=291,6
х=108