Question

(9×b)-38=16.
(b×9)-37=35
(81:c)+58=67
(c:7)+60=81
(a×8)+25=73
(2×a)-28=26
78+(56:a)=85
21+(32:a)=28

Answer 1

Răspuns:

1.(9×b)=16+38=54

b=54:9=6

2.(b×9)=35+37=72

b=72:9=8

3.(81:c)=67-58=9

c=81:9=9

4.(c:7)=81-60=21

c=21×7=147

Si tot asa prin metoda mersului invers