Răspuns :
x+y=857
x-y=343
fie
x-y=343 ; x=343+y
inlocuim x cu y in prima ecuatie
343+y +y =857
2y=857-343=514
y=257;x=600
x-y=343
fie
x-y=343 ; x=343+y
inlocuim x cu y in prima ecuatie
343+y +y =857
2y=857-343=514
y=257;x=600
a |----| + 343
b |----|
857-343=514( doua segmente egale)
514:2=257 ( b)
257+ 343= 600( a)
verificare: 600+257= 857
b |----|
857-343=514( doua segmente egale)
514:2=257 ( b)
257+ 343= 600( a)
verificare: 600+257= 857