Question

A+b=100, b+c=110, a+c=90

Answer 1

• Adunam relatiile

a+b + b+c + a+c = 100 + 110 + 90

2a + 2b + 2c = 300

2(a + b + c) = 300

a + b + c = 150

a + b = 100 => c = 150 - 100 = 50

b + c = 110 => a = 150 - 110 = 40

a + c = 90 => b = 150 - 90 = 60

Answer 2

Răspuns:

Explicație pas cu pas:

a + b = 100

b + c = 110

a + c = 90

2× ( a + b + c ) = 100 + 110 +90

2× ( a + b + c ) = 300

a + b + c = 300 : 2 = 150

c + 100 = 150, c = 150 - 100 = 50

a +110 = 150, a = 150 - 110 = 40

b + 90 = 150, b = 150 - 90 = 60