Question

a + b + c = 60
a = 3 x b
c = a - b

Answer 1

Răspuns:

3×b+b+a-b = 60

3×b+a = 60 | ÷3

b+a=20

20+c = 60 => c = 40

a = 3b

b = a/3

a+a/3+40 = 60

a+a/3 = 20

(3a+a)/3 = 20

4a = 60

a = 15

b = 15/3 = 5

a = 15

b = 5

c = 40