Question 17

Explanation

Let Andi's initial money be $A$, Budi's money be $B$, and Cici's money be $C$.

Given that Andi's money is four times Budi's money, we can write the equation:

If Andi donates Rp4,000.00, his remaining money is $A - 4,000$.

If Budi spends Rp1,000.00, his remaining money is $B - 1,000$.

It is known that the remainder of Andi's money is equal to the remainder of Budi's money plus Cici's money. The equation is:

Next, substitute $B = \frac{1}{4}A$ into the equation to find the value of $A$:

Multiply both sides by $\frac{4}{3}$:

So, Andi's initial money is $\frac{4}{3}C + \text{Rp}4,000.00$.