Question

Daca a-b=5si c+d=1,atunci calculati valoarea expresiei:2a-2b+4c+4d
VA ROGGGGGGGG SAAAA MAAAAAAA AJUTATIIIIIIIIIIII URGENTGTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

2a-2b+4c+4d=
2x5+4(c+d)=
10+4x1=14

Answer 2

a-b=5
c+d=1

2a-2b+4c+4d=
=2(a-b)+4(c+d)=
=2*5-4*1=10+4=14