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136×12+3×m=1605 cum se rezolva

Răspuns :

1632+3m=1605
3m=1605-1632
3m= - 27
m= - 9
136x12+3xm=1605
1632+3xm=1605
1632+m=1605:3
1632+m=535
m=1632-535
m=1097