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află nr. necunoscut 36-24÷6-b+49÷7=29

Răspuns :

36-24:6-b+49:7=29
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36-4-b+7=29
32-b+7=29
32-b=29-7
32-b=22
b=32-22
b=10
36-24:6-b+49:7=29
36-4-b+7=29
39-b=29
b=10