Question

1.Daca ab+ac=25 si a = -5 calculati b+c
2.daca ax-2bx+cx=32, a-b= -9 si c-b= -7
Aflati x

Answer 1

1. a(b+c)=25 -5(b+c)=25 b+c=25:(-5) b+c=-5 2.x(a-2b+c)=32 x[(a-b)+(c-b)]=32 x[9+(-7)]=32 x(9-7)=32 2x=32 x=16