Question

помогите решить 8a+(3-a)-(4a+5)

Answer 1

8a+(3-a)-(4a+5)= 8а+3-а-4а-5=3а-2

Answer 2

$8a + 3 - a \: - 4a - 5 = \\ = 3a - 2$
$3a = 2 \\ a = \frac{2}{3}$