Question

Simplifique as espressões:

a) 6x + (4x-4) - (-3x+9)=
b) (2x+y) - (12x+5y)=
c) -2m - (+m-5) +13=
d) 10a - b - [5a-(a+b)]=

me ajudem xD

Answer 1

a) 6x + ( 4x - 4) - ( - 3x + 9) =
6x + 4x - 4 + 3x - 9=
6x + 4x + 3x - 9 - 4
13x - 13
b) (2x + y) - ( 12x + 5y) =
2x + y - 12x - 5y =
2x - 12x + y - 5y =
- 10x - 4y
c) - 2m - ( + m - 5) + 13 =
- 2m - m + 5 + 13 =
- 3m + 18
d) 10a - b - [ 5a - ( a + b)] =
10a - b - [5a +a - b] =
10a - b - 5a - a + b =
10a - 5a - a - b + b =
4a