1)
НОД(64; 144) = 16
64 : 16 = 4; 144 : 16 = 9
2)
НОК(12,8) = 24
24 : 12 = 2; 24 : 8 = 3
3)
НОК(9,15) = 45
45 : 9 = 5; 45 : 15 = 5
4)
НОК(25,15) = 75
75 : 25 = 3; 75 : 15 = 5
5)
<span>НОК(16,24) = 48
48 : 16 = 3; 48 : 24 = 2
</span>
1)5х-3=3х+19
5х-3х=19+3
2х=22
х=11
2)4х+12=-3х+40
4х+3х=40-12
7х=28
х=4
3)4х+19=100-5х
4х+5х=100-19
9х=81
х=9
4)-5х-15=-3х+13
-5х+3х=13+15
-2х=28
х=-14