Question

stiind ca a·B+a·C =100si b+c =20,atunci a este egala cu a)4 b)200 c)5 d)80

Answer 1

a x B +a x C=100
a(B+C)=100
a x 20=100
a=100/20
a=5

Answer 2

a(b+c)  =100
a + 20  = 100
a =100-20 =80  (d)