Укажите верное равенство.
1) 5(a + 8) = 5a + 8
2) 5(a + 8) = 5a + 40
3) 5(a + 8) = a + 40
4) 5(a + 8) = 13a
1)
5(a + 8) = 5a + 8
5a + 40 = 5a + 8 − неверно
2)
5(a + 8) = 5a + 40
5a + 40 = 5a − 40 − верно
3)
5(a + 8) = a + 40
5a + 40 = a + 40 − неверно
4)
5(a + 8) = 13a
5a + 40 = 13 − неверно
Ответ: 2) 5(a + 8) = 5a + 40