Question

The equation __________ and $2x+2=0$ have the same solution.

• A. $x-1=0$
• B. $x+1=0$
• C. $x-2=0$
• D. $x+2=0$

Answer 1

The correct option is B $x+1=0$

Lets check option B.

$x+1=0$
$\Rightarrow x+1-1=0-1$
[Subtracting $1$ from both sides]
$\Rightarrow x=-1$ ....(i)
and $2x+2=0$

$\Rightarrow 2x+2-2=0-2$ .....[Subtracting $2$ from both sides]
$\Rightarrow 2x=-2$

$\Rightarrow x=-1$ ..... (ii)
Thus, from (i) and (ii)
Both equations have the same solution.