25x+49=149

(x-12) •8=56

124: (y-5) = 31

43m-215=473

44:x+9=20

181-8x=45

3x+7x+18=178

34x+68=68

25 х+49=149.

25 х=149-49

25 х=100

х=100:25

х=4;

(х-12) * 8=56

х-12=56:8

х-12=7

х=12+7

х=19;

124: (у-5) = 31

у-5=124:31

у-5=4

у=5+4

у=9;

43m-215=473

43m=473+215

43m=688

m=688:43

m=16;

25x+49=149

25 х=149-49

25 х=100

х=4

(x-12) •8=56

8 х-96=56

8 х=56+96

8 х=152

х=19

124: (y-5) = 31

124*1/31=у-5

4=у-5

-у=-9

у=9

43m-215=473

43m=473+215

43y=688

y=16

44:x+9=20

-x/44=-1/11

x=4

181-8x=45

-8 х=45-181

-8 х=-136

х=17

3x+7x+18=178

10 х=178-18

10 х=160

х=16

34x+68=68

34 х=68-68

34 х=0

х=0