Question

sa se afle numerele A,b,c stiind ca:a+b=35
b+c=65
a+c=60
coroana cel mai explicit răspuns

Answer 1

a + b = 35

b + c = 65

a + c = 60

__________________ → adun sumele

2 x a + 2 x b + 2 x c = 35 + 65 + 60

2 x ( a + b + c ) = 160

a + b + c = 160 : 2

a + b + c = 80 → suma celor trei numere

______________________________

80 - 65 = 15 ( a )

35 - 15 = 20 ( b )

65 - 20 = 45 ( c )

______________

a + b = 15 + 20 = 35

b + c = 20 + 45 = 65

a + c = 15 + 45 = 60