Kai Yi and Isaac were given some money each. If Kai Yi spent $25 and Isaac spent $75 each, Kai Yi will still have $2100 while Isaac spent all his money. If Kai Yi spent $75 and Isaac spent $25 each day, Kai Yi would still have $900 while Isaac had spent all his money. How much money was given to each of them?

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# Question

# Answer

Ender

Scenario 1,

KY : Isaac => 25 : 75 , KY has $2100 left

Scenario 2,

KY : Isaax => 75 : 25 , KY has $900 left.

Both scenario, ISaac spent all his mnoney. Which also mean that’s the amount he has in the begining

We multiply 3 to scenario 2, so both scenario share common units. And that make sense coz in the end, Issac spent what he has in both scenario.

Scenario 2 now becomes,

KY : Isaac => 225 : 75, and KY has 900 left.

Now both scenario share common units, I can define KY money with two equation, one each from both scenario

KY = 25u + $2100

KY = 225u + $900

25u + 2100 = 225u + 900

200u = 1200

u = 6

KY was given = 25u + 2100 = $2250 ###

Isaac was given = 75u = $450 ###

Funz

This I understand. Thank you very much!