Question

Determina numerele a,b,c,d,e,f stiind ca: b+c+d=16 c•d=18 d+e=81:c f=4•d d=38:19 a+b+c+d+e+f=34

Answer 1

b+c+d=16⇒b+9+2=16⇒b+11=16⇒b=16-11⇒b=5
c·d=18⇒c=18:2⇒c=9
d+e=81:c⇒2+e=81:9⇒2+e=9⇒e=9-2⇒e=7
f=4·d⇒f=4·2⇒f=8
d=38:19⇒d=2
a+b+c+d+e+f=34
a+5+9+2+7+8=34
a+31=34
a=34-31
a=3

coronita?