Question

(a) The sum of two integers is 94. If one of them is -25, find the other?

(b) The sum of two integers is -320. If one of them is +80, find the other?

(c) The sum of two integers is 100. If one of them is -50, find the other?

(d) The sum of two integers is -660. If one of them is -70, find the other? [4 MARKS]

Answer 1

Each option: 1 Mark

$\text{(a). Let the integer be x}\Rightarrow -25+x=94\Rightarrow x=94+25\Rightarrow x=119$

$\text{(b). Let the integer be x}\Rightarrow 80+x=-320\Rightarrow x=-320-80\Rightarrow x=-400$

$\text{(c). Let the integer be x}\Rightarrow -50+x=100\Rightarrow x=100+50\Rightarrow x=150$

$\text{(d). Let the integer be x}\Rightarrow -70+x=-660\Rightarrow x=-660+70\Rightarrow x=-590$