Question

simplifique as expressões:
5a-a+8a

7x+5-13x+2​

Answer 1

5a-a+8a

4a+8a

12a

7x+5-13x+2

7x-13x+5+2

-6x+7

Answer 2

1.

$5a - a + 8a = \\ 4a + 8a = \\ \boxed{\red{12a}}$

2.

$7x + 5 - 13x + 2 = \\ 7x - 13x + 5 + 2 = \\ \boxed{\red{- 6x + 7}}$