6. х+256=698-232
х+256=466
х=466-256
х=210
210+256=698-232
49:х=28:4
49:х=7
х=49:7
х=7
<span>х =5 имеем 2,9*5=14,5.
при х=5.6 имеем 2,9*5,6=16,24</span>
20часов=60мин•20часов=1200(минут)
<span>2,45(м-8,8)=4,41</span>
<span>2,45м-21,56=4,41</span>
<span>2,45м=4,41+21,56</span>
<span>2,45м=25,97</span>
<span>м=25,97:2,45</span>
<span>м=10,6</span>