(−7)+(−9)+12+(−16)=?
(a) −20
(b) 20
(c) −12
(d) none of these
Correct option is (a) –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