guess it?

[arnoldmina13]

Comments

[ponts]

Five!

[arnoldmina13]

i guess 15

[ponts]

1. 3a = 30
   a = 10

2. 2a + b = 40
   20 + b = 40
   b = 20

3. a + 2b + 2c = 60
   10 + 40 + 2c = 60
   2c = 10
   c = 5