We are given the following information.
The number of belts sold (s) x days after the launch is represented by the following equation.
The number of wallets sold (s) x days after the launch is represented by the following equation.
Let us graph both of the equations.
The intersection of the two graphs is the point where the sales of belts and wallets become equal.
As you can see, the intersection occurs at (3, 27)
Here 3 is the number of days and 27 is the number of belts and wallets sold.
After 3 days, the number of belts sold will be the same as the total number of wallets sold.
The number of belts and the number of wallets Mr. Matthew sold after this many days is 27