Question

Află nr a,b si c , știind ca:
a+b+c=20 a+b=c a+c=16

Answer 1

a + b + c = 20

a + b = c

a + c = 16

c + c = 20

2 × c = 20

c = 20 : 2

c = 10

a = 16 - 10

a = 6

6 + b = 10

b = 10 - 6

b= 4

Answer 2

a+b+c=20

a+b=c

a+c=16

___________

b=20-(a+c)=>b=20-16=>b=4

a+4+c=20=>a+4+a+4=20=>2a=20-8=>2a=12=>a=6

c=a+b=>c=6+4=>c=10