Step-by-step explanation:
Ok they need to make $1,260.
Each t-shirt sells for $12 but they only make half that amount $6
So far 85 t-shirts have been sold
85 * 12 = 1,020
Ok but remember its half that amount-
1,020 / 2 = 510
So far they have $510 raised.
1260 - 510 = 750
They still need to raise $750.
If we divide $750 / 6 = 125
So that's our answer, now if we wanna verify-
125 * 12 = 1500
1500 / 2 = 750
So after revising, we are left with the answer 125, Mathewson middle school must sell 125 more t-shirts to make the desired amount.
Hope this helps! :)