Question

1) 2 (X + 1 ) = 13
. 2

2) X = 1 (x - 1 )
. 2


3) X- 1 + X-3 = 6
. 2. 3

Answer 1

1) 2(x+1)=13.2 2x+2=26 2x=26-2 2x=24 X=24/2 x=12 2) x=1(x-1).2 x=x-1.2 x=x+1 x-x=1 Sem Soluções 3) x-1+x-3=6.2.3 2x-1-3=36 2x=36+1+3 2x=40 X=40/2 x=20

Answer 2

1) 2.(x+1)=13.2
2x+2=26
2x=26-2
2x=24
x=24:2
x=12

2) x=1.(x-1).2
x=(x-1).2
x=2x-2
x-2x=-2
-x=-2.(-1)
x=2

3) x-1+x+3=6.2.3
2x-2= 12.3
2x=36+2
2x=38
x=38:2
x=19