Question

3.(x-1)+2.(x+1)=3.(x+1)-2.(x-1)encontramos o valor para x o valor:

(a)1,5
(b)1,0
(c)2,0
(d)2,5
(e)3,0

Answer 1

3.(x-1)+2.(x+1)=3.(x+1)-2.(x-1)
3x-3+2x+2=3x+3-2x+2
5x-1=x+5
5x-x=5+1
4x=6
x=6/4=1,5

Letra A

Answer 2

3(x +1) + 2(x + 1) = 3(x + 1) - 2(x - 1)
3x + 3 + 2x + 2 = 3x + 3 - 2x + 2
3x + 2x - 3x + 2x = 3 + 2 - 3 - 2
4x = 1
x = 1/4 ou x = 0,25