Question

$(-7)+(-9)+12+(-16)=?$
$\left(a\right)-20$
$\left(b\right)20$
$\left(c\right)-12$
$\left(d\right)$ none of these

Answer 1

Correct option is $\left(a\right)–20$

Since, we know that $+(-x)=-x$
Substitute $x=7$, we get
$+(-7)=-7$
Similar way, $+(-9)=-9$ and $+(-16)=-16$
Substitute above values in given expression, we get
$(-7)+(-9)+12+(-16)$
$=-7-9+12-16$
$=-20$
Therefore, the value of the given expression is $-20$