Question

Va rog rezolvati problema 6 dau coroana

Answer 1

a+b+c+d=845
a=b+10 
b=c+25 =>c=b-25
c=d+15 sau b-25=d+15 =>b-d=40 =>d=b-40

b+10+b+b-25+b-40=845
4b=845+55
4b=900 =>b=225
a=225+10 =>a=235
c=225-25 =>c=200
d=225-40 =>d=185

Answer 2

 a+b+c+d=845
a=10+b
b=25+c
c=15+d
rezulta ca b=25+15+d=40+d
                a=10+40+d=50+d
inlocuim in suma celor 4 numere
50+d+40+d+15+d+d=845
105+4d=845
4d=845-104
4d=740
d=740:4
d=185 timbre
c=15+185
c=200timbre
b=25+200
b=225timbre
a=10+255
a=235 timbe
verificare
235+225+200+185=845
sper ca te-am ajutat