8,68х+3.92=17.7
8.68х=13.78
х= 1.58
ответ: х=1.58
2.8*3.1x=8.68x
2.8*1.4=3.92
8.68x-3.92=17.7
8.68x=17.7+3.92
8.68x=21,62
21,62/8.68=примерно 2.5
8,68х+3.92=17.7
8.68х=13.78
х= 1.58
ответ: х=1.58
2.8*3.1x=8.68x
2.8*1.4=3.92
8.68x-3.92=17.7
8.68x=17.7+3.92
8.68x=21,62
21,62/8.68=примерно 2.5