1) х+7/12=3/4
х-1/6=1/9​

1)x-7/12=3/4

х=3/4+7/12=(3*3+7*1)/12

x=16/12=4/3

x=1 целая 1/3

2)x-1/6= 1/9

х=1/9+1/6= (1*2+1*3)/18

x=5/18

3)x-3/5=3/8

x=3/8+3/5= (3*5+3*8)/40=(15+24)/40

x=39/40

4)x-5/24=11/12

x=11/12+5/24

x=(11*2+5*1)/24=27/24=9/8

x=1 целая 1/8

5)y-2/7=1/3

y=1/3+2/7

y= (1*7+2*3)/21= 13/21

y=13/21

6)x-5/6=7/9

x=7/9+5/6=(7*2+5*3)/18=29/18

x=1 целая 11/18

7)y-3/8=5/32

y=5/32+3/8= (5*1+3*4)/32=17/32

y=17/32

1. х = 1/6

2. х = 5/18

Пошаговое объяснение:

1.  х+7/12=3/4

х = 3/4 - 7/12

х = (3*3-7)/12

х = 2/12

х = 1/6

2. х-1/6=1/9​

х = 1/9 + 1/6

х = (1*2+1*3)/18

х = 5/18