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OoBiscuitteeoO
a fost răspuns

Rezolvati in multimea nr nat ecuatia:
3*{10+2*[40-2*(28-3*5)]}-7x=51

Răspuns :

Renatemambouko
3*{10+2*[40-2*(28-3*5)]}-7x=51
{10+2*[40-2*(28-15)]}-7x=17
[10+2*(40-2*13)]-7x=17
[10+2*(40-26)]-7x=17
(10+2*14)-7x=17
38-17=7x
7x=21
x=3

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