Решите неравенство: 4(а+8) - 7(а-1) < 12

Question

Решите неравенство:

4(а+8) - 7(а-1) < 12

Answer 1

4(а+8) - 7(а-1)<12</span>

4a+32-7a+7<12</span>

-3a+39<12</span>

-3a<12-39</span>

-3a<-27</span>

a>9

Answer 2

4а+32-7а +7<12</span>

4а-7а<12-32-7</span>

-3а <-27</span>

а →(знак больше:D) -27:(-3)

а → 9