Answer: Let's denote the number of additional houses sold after the first one as "x".
Since the commission for the first house sold is GHc3750, the commission for selling x additional houses is GHc500x.
Therefore, the total commission earned by selling x additional houses is:
GHc3750 + GHc500x
We want to find the value of x that makes the total commission equal to GHc6500. Setting up an equation and solving for x, we get:
GHc3750 + GHc500x = GHc6500
GHc500x = GHc2750
x = 5.5
Since we can't sell half of a house, we round up to the nearest whole number. Therefore, the estate dealer must sell a total of 6 houses (including the first one) to reach a total commission of GHc6500.
Explanation: