381*29-7248:24= 10 747 1)381*29=11 049 2)7248:24=302 3)11049-302=10 747
207792/2=103896 207792/4=51648 207792/8=25974
207800/2=103900 207800/4=51950 <span>207800/8=25975
</span><span> 201808/2=10904 =51952 =25976
</span><span>207816=10908 =51954 =25977</span>
(6/7 - y) + 2/7 = 5/7
6/7 - y = 5/7 - 2/7
6/7 - y = 3/7
y = 6/7 - 3/7
y = 3/7
(6/7 - 3/7) + 2/7 = 5/7
5/7 = 5/7
{20 - (3а - 7)} /10 = 9/10
20 - (3а - 7) = 9/1 = 9
20 - (3а - 7) = 9
3а - 7 = 20 - 9
3а - 7 = 11
3а = 7 + 11
3а = 18
а = 18 : 3
а = 6