Question

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

Answer 1

Răspuns:

$a(1 + 2b + 5c - 3d) =$

$a(1 + 2b + 2c + 3c - 3d) =$

$a(1 + 2(b + c) + 3(c - d)) =$

$7 \times (18 \times 2+ 11 \times 3)$

$7(36 + 33) = 7 \times 69 = 483$