х+5 х+12=72 37 + (2 х-3) = 98 75 - (3 х+1) = 50

100: (3 х+1) = 4

1024: (12+х) = 32

35 * (х+99) = 3675

х+5 х+12=72

6 х+12=72

6 х=72-12

6 х=60

х=60:6

х=10

10+10*5+12=72

72=72

х+5 х+12=72

6 х=72-12

6 х=60

х=6066

х=10

37 + (2 х-3) = 98

2 х-3=98-37

2 х-3=61

2 х=61+3

2 х=64

х=64:2

х=32

75 - (3 х+1) = 50

75-50=3 х+1

25=3 х+1

25-1=3 х

24=3 х

х=24:3

х=8

100: (3 х+1) = 4

100:4=3 х+1

25=3 х+1

25-1=3 х

24=3 х

х=24:3

х=8

1024: (12+х) = 32

1024:32=12+х

32=12+х

32-12=х

х=20

35 * (х+99) = 3675

35 х+3465=3675

35 х=3675-3465

35 х=210

х=210:35

х=6