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-daca nu intelegeti-
Determinati numarul x stiind ca a-b=6 si 7•a-7•b+x=55


Daca Nu IntelegetiDeterminati Numarul X Stiind Ca Ab6 Si 7a7bx55 class=

Răspuns :

a - b = 6

7 × a - 7 × b + X = 55
7 × ( a - b ) + X = 55
7 × 6 + X = 55
42 + X = 55
X = 55 - 42
X = 13

a-b=6

7•a-7•b+x=55

7(a-b)+x=55

7•6+x=55

x=55-42

x=13