Respostas

2014-05-19T15:43:57-03:00
(2+3)²-x = 12 
5² - x = 12
25-x = 12
x = 25-12
x = 13
1 5 1
  • Usuário do Brainly
2014-05-19T15:49:23-03:00
(2 + 3)² - x = 12
5² - x = 12
25 - x = 12
- x = 12 - 25 . (- 1)
x = - 12 + 25
x = 13