Question

a=18 b+c=57 rezolvati exercitiul 3inmultit cu a +2 inmultit cu b+2inmultit cu c=

Answer 1

3×a+2×b+2×c=3a+2(b+c)=3×18+2×57=54+114=168

Answer 2

$b+c=57 \\ a=18 \\ 3a+2b+2c=3a+2(b+c)=3 \cdot 18+2\cdot 57=54+114=168 \\ \boxed{3a+2b+2c=168}$