<span>Запишите в виде дроби частное:
1) 5:7 =
2) 19:4= </span><span>
= 4 </span><span>
3) 1:6 = </span><span>
4) 30:4 = </span><span>
= 7 </span><span>
= 7 </span><span>
5) 6:1 = </span><span>
(=6)
6) 12:39 = </span><span>
</span>
64+36:(х*3-15)=70
64+12х-2*(6/15)=70
12х-2*(6/15)=6
12х*8 (6/15)
х=8*(6/15)/12
х=20/30
X+4263=703000
X=703000-4263
X=66037
Ответ:X=678737