8x-4x+5=25

851: (13+x) = 37

(y-12) •36=1260

(x-12) : 13=82

1) 4 х + 5 = 25

4 х = 25:5

4 х = 5

х = 5 : 4

х - 0.8

2) 13+х = 851:37

13+х = 23

х = 23-13

х = 10

3) у-12 = 1260:36

у-12 = 35

у = 35+12

у=47

4) х-12 = 83•13

х-12 = 1079

х = 1079+12

х = 1091

8 х-4 х+5=25

4 х+5=25

4 х=25-5

4 х=20

х=20:4

х=5

851: (13+х) = 37

13+х=851:37

13+х=23

х=23-13

х=10

(y-12) * 36=1260

y-12=1260:36

y-12=35

y=35+12

y=47

(x-12) : 13=82

x-12=82*13

х-12=1066

х=1066+12

х=1078