Question

Aflati numerele a,b, c stiind ca a+b=c, a-b=b, b+c=36

Answer 1

Răspuns:

a = 18

b = 9

c = 27

Explicație pas cu pas:

a - b = b => a = b + b = 2b

a + b = c => 2b + b = c => c = 3b

b + c = 36 => b + 3b = 36 => 4b = 36 => b = 36 : 4 = 9

Astfel, c = 3 * 9 = 27, iar a = 2 * 9 = 18

Answer 2

a+b=c
b+a+b=36
a+2b=36

a-b=b=>a=b+b=>a=2b

2b+2b=36
4b=36=>b=9
a=18
c=27