Question

Verify that - (-x) = x for :
$x=\frac{11}{15}$

Answer 1

Putting
$x=\frac{11}{15}$ in -(-x)=x,
$-(-\frac{11}{15})=\frac{11}{15}\Rightarrow \frac{11}{15}=\frac{11}{15}$
$\Rightarrow$ L.H.S = R.H.S
Hence, verified.