Question

Express the following information in mathematical form using two variables $m$ and $n$
(a) Sum of the two numbers is $15$.
(b) Difference of the two numbers is $17$.

Answer 1

According to questions
(a) $m+n=15$ ...... (i)
(b) $m-n=17$ Adding ...... (ii)
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$2m=32$
$m=\frac{32}{2}=16$
Put the value of m in equation (i), we get
$n=15-16=-1$