Question

2x + 5=11 if only if x =3

Answer 1

Solve;

$\begin{gathered} 2x+5=11 \\ \text{If only x=3, then} \\ 2(3)+5=11 \\ 6+5=11 \\ 11=11 \\ \text{LHS}=\text{RHS} \end{gathered}$