👤

Stion de ca A=14 b+c=56 . Sa se calculeze 34b+34c-56a.

Răspuns :

34b + 34c - 56a=
34 ( b + c) - 56a =
34 · 56 - 56a =
1904 - 56a =
1904 - 56 · 14 =
1904 - 784 = 1120
a= 14
b+c=56
34b+34c -56a = 34(b+c) -56 × 14
=34×56-56×14
=1904 - 784
=1120