3/4*2/2=6/8
5/9*3/3 = 15/ 27
4/5*4/4=16/20
7/8*5/5=35/40
4/35 · 17/18 + 17/18 · 31/35 = 17/18· (4/35 + 31/35)=17/18 · 35/35=17/18
72/73 · 34/65 + 72/73 · 39/65 = 72/73· (34/65 + 39/65)=72/73 · 73/65=72/65=1 7/65
16х=384. х= 384:16, х= 24
1) 4х-6+10х=11х+12
14х-11х=12+6
3х=18
Х=18/3
Х=6
2) 8+4(х-2)=-10-х
8+4х-8=-10-х
5х=-10
Х=-2
3) 2(5-2х)-(х+1)=-6
10-4х-х-1=-6
-5х=-15
Х=3
4) 3-7х=-5(х+3)
3-7х=-5х-15
-2х=-18
Х=9