Question

determina numerele a.b.c stiind ca a+b=700.b+c=500.a+c=800

Answer 1

700+500+800=2000(dublul sumei a+b+c). 2000:2=1000(suma a+b+c)

Answer 2

700+500+800=2000
a+b+c=200:2=1000
a+b=700
c=1000-700=300
b+c=500
b=500-300=200
a=700-200=500