Помогите пожалуйста
1) 1457:(7+8х)=47
2) 23х+х-10=38
3) 1,5х-0,2х+1,4х=291,6
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7 + 8х = 31
8х = 31-7
8х = 24
х = 3
2) 24х = 38 + 10
24х = 48
х = 2
3) 2,7 х = 291,6
х = 108