Question

The equation having $-3$ as a solution is:

• A. $x+1=0$
• B. $2x+8=2$
• C. $x+3=1$
• D. $5x+1=0$

Answer 1

The correct option is B $2x+8=2$

If -3 is the solution of the equation then it will satisfy the equation.

Consider $x+1=0$
Substitute $x=-3$ then $-3+1=-2\ne 0$
Consider,
$2x+8=2....\left(2\right)$

Consider LHS of equation $\left(1\right)$.
Put $x=-3$, we get
$2(-3)+8$
$=-6+8$
$=2$
LHS is equal to RHS.
Hence, the equation having $-3$ as a solution is $2x+8=2$.

Consider $x+3=1$
Substitute $x=-3$ then $-3+3=0\ne 1$

Consider $5x+1=0$
Substitute $x=-3$ then $5(-3)+1=-14\ne 0$