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Cum aflam

numarul stiind ca a+B=3000
B+C=5000
A+c=4000


Răspuns :

Adunam relatiile

a + b + b + c + c + a = 3000 + 5000 + 4000

2a + 2b + 2c = 12000

2(a + b + c) = 12000

a + b + c = 6000

a + b = 3000 => c = 6000 - 3000 = 3000

b + c = 5000 => a = 6000 - 5000 = 1000

a + b = 4000 => b = 6000 - 4000 = 2000