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a fost răspuns

Daca a=18 si b+c=57 atunci calculation valoarea expresiilor:
a+5×b+5×c
3×a+2×b+2×c
a×b+a×c+7×b+7×c

Răspuns :

Adinacruceanu277
a+5(b+c)=18+5*57=18+285=303
3a+2b+2c=3*18+2(b+c)=54+2*57=54+114=168
a*b+a*c+7*b+7*c=a*(b+c)+7*(b+c)=18*57+7*57=1026+399=1425

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