1/2 / 3/4 = 1*4/3*2 = 2/3
5/12 / 2/3 = 5*3/12*2 = 5/8
4/9 / 2/3 = 4*3/9*2 = 2/3
1) -4х+1=13
-4х=13-1
-4х=12
х=12/(-4)
х=-3
2)-х+9=16
-х=16-9
-х=5
х=5/1
х=-5(не уверена)
3)7х+17=х-1
7х-х=-17-1
6х=-18
х=-18/6
х=3
4)не верно записано уравнение.
5)4(6Х+11)-14=2(2Х-5)
24Х+44-14=4Х-10
24Х-4Х=-44+14-10
20Х=-40
Х=-40/20
Х=-2
6)2(Х+1)-8=Х+4
2Х+2-8=Х+4
2Х-Х=-2-8+4
1Х=-6
Х=-6
7)8(2х-3)+7=4(2-х)-1
16х-24+7=8-4х-1
16+4х=24-7+8-1
20х=24
х=24/20
х=1,2
21:5=4(ост.1), 26:6=4(ост.2), 22:6=3(ост.4), 27:7=3(ост.3), 23:7=3(ост.2), 28:5=5(ост.3), 24:5=4(ост.4), 29:6=4(ост.5).