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daca a=7, b+c=18,c-d=11 calculati a+2ab+5ac-3ad​

Răspuns :

Răspuns:

[tex]a(1 + 2b + 5c - 3d) = [/tex]

[tex]a(1 + 2b + 2c + 3c - 3d) = [/tex]

[tex]a(1 + 2(b + c) + 3(c - d)) = [/tex]

[tex]7 \times (18 \times 2+ 11 \times 3)[/tex]

[tex]7(36 + 33) = 7 \times 69 = 483[/tex]