Răspuns :

Crys157724id

x+18=56

x=56-18

x= 38

x-18=56

x=56+18

x=74

32+y=50

y=50-32

y=18

50-y=32

y=50-32

y=18

a×7=28

a=28:7

a=4

8×a=56

a=56:8

a=7

b:4=9

b=9×4

b=36

63:b=7

b=63:7

b=9

Daniel201793id

Explicație pas cu pas:

x+18=56

x=56-18

x=38

v:38+18=56

x-18=56

x=56+18

x=74

v:74-18=56

32+y=50

y=50-32

y=18

v:32+18=50

50-y=32

y=50-32

y=18

v:50-18=32

a×7=28

a=28:7

a=4

v:4×7=28

8×a=56

a=56:8

a=7

v:8×7=56

b:4=9

b=9×4

b=36

v:36:4=9

63:b=7

b=63:7

b=9

v:63:9=7