Question

determina numerele a b c stiind ca a+b=700

b+c=500, a+c=800

rezolfare cu tot cu aflari

Answer 1

aduni toate relatiile
2(a+b+c)=700+500+800=2000
a+b+c=2000÷2
a+b+c=1000
a+b=700
scadem cele doua relatii si obtinem
c=300
b=500-c=500-300=200
a=800-c=800-300=500