Final answer:
If the vendor had a sum of money amounting to ₱100, he could buy shirts at ₱100 each.
Step-by-step explanation:
Let's assume that the vendor had ₱x as the sum of money. With this amount, the vendor was able to buy shirts at ₱100 each. If the price had been ₱4 less, he would have obtained 2 more shirts.
So, we can set up the equation:
₱x / ₱100 = ₱(x - 4) / ₱96
Now we can solve for x:
₱x / ₱100 = ₱(x - 4) / ₱96
Cross multiply:
₱96x = ₱100(x - 4)
Expand:
₱96x = ₱100x - ₱400
Subtract ₱100x from both sides:
₱96x - ₱100x = - ₱400
Simplify:
-₱4x = - ₱400
Divide both sides by -4:
x = 100
Therefore, the vendor had a sum of money amounting to ₱100.