Question

9. The sum of two numbers is 30 and their difference is 16. Then, find the smaller number​

Answer 1

$\huge\mathcal\red{Answer}$

$x + y = 30 \\ x - y = 16 \\ adding \: both \: equation \: gives \: \\ 2x = 46 = x = 23 \\ putting \: value \: of \: equation \\ x + y = 30 \\ y = 30 - 23 \\ y = 7 \\ so \: smaller \: number \: is \: y = 7$

Hence, smaller number is y = 7