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(1000-c×3+197) : 137 = 6
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Răspuns :

1197-3c=6×137;
3c=1197-822; 3c=375;. c=375÷3;
c=125
Deci:. (1000-c×3+197)÷137=6
(1000-cx3+197):137=6

1000-cx3+197=6x137

1000-cx3+197=822

1000-cx3=822-197

1000-cx3=625

cx3=1000-625

cx3=375

c=375:3

c=125

sau

(1000-cx3+197):137=6
(1000+197)-cx3:137=6
1197-cx3:137=6
1197-cx3=6x137
1197-cx3=822
cx3=1197-822
cx3=375
c=375:3
c=125