1,53*54-0,42-(512-491,2)+1,116 = 62.516
1) 1.53*54 = 82.62
2) 512-491.2 = 20.8
3) 82.62 - 0.42 = 82.2
4) 82.2 - 20.8=61.4
<span>5) 61.4+1.116=62.516</span>
Х+12=45
х=33....................................
48у/х=12х/у
Х=2у
Т=48у/2у=24 мин
Первый шел 24+12=36мин
<span>Второй 24+48=72мин</span>
А)m:(-7,2)=5,3:3,6
m:(-7,2)=53/36
m=53/36*(-72/10)
m-10,6
б)<span>-7 1/4/x = 9 2/3/3 1/3
</span><span>-7 1/4/x = 2,9
x=2,5</span>