(х*7-86,48):2,4=4,8
7х-86,48=4,8*2,4
7х- 86,48=11,25
7х=11,25+86,48
7х=98
х=98:7
х=14
(14*7-86,48):2,4=4,8
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(х*7-86,48):2,4=4,8
7х-86,48=4,8*2,4
7х- 86,48=11,25
7х=11,25+86,48
7х=98
х=98:7
х=14
(14*7-86,48):2,4=4,8