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

Question

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

Answer 1

25x+49=149
25х=149-49
25х=100
х=4

(x-12)•8=56
8х-96=56
8х=56+96
8х=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
-8х=45-181
-8х=-136
х=17

3x+7x+18=178
10х=178-18
10х=160
х=16

34x+68=68
34х=68-68
34х=0
х=0

Answer 2

25х+49=149.

25х=149-49

25х=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;