Why can a subtraction problem be rewritten as an addition problem without changing the outcome? give a real-world scenario where this might be modeled.

if u say "if u substract 3rupees from my money", it could be rephrased as "if u add tadd three rupees to your you will get mine

$100- $50= $50 
and 
$100+(-5o)= $50
hope it helps

38+105= 143, 39+104=143, and you will find then adding the numbers on opposite sides, moving inwards yields the answer 138 every time. because of this, you’re going to multiply 138 times the number of pairs, which is 34. therefore, 34*138= 4692(i’m sorry if it’s the wrong numbers, but it’s the right concept)