Question

The sum of two integers is −25. If one of them is 30 then the other is
(a) 55
(b) 5
(c) −55
(d) none of these

Answer 1

(c) –55
Let x be the other integer.
x + 30 = –25
$\Rightarrow$ x = –25 – 30
$\Rightarrow$ x = –55