Step-by-step Answer
PAGE: 146SET: ExercisesPROBLEM: 1
Please look in your text book for this problem Statement

Let be the number of T-shirts.

Let be the number of hats.

Observe the table:

The cost and sale price of each item is shown.

The boosters spend a total of on T-shirts and hats.

The total selling price on T-shirts and hats make .

Find how many T-shirts did they sell.

Cost price: .

Sales price: .

The system of equations is and .

Solve the equations and find the value.

                                   (Cost price)

               (Subtract from each side)

                               (Apply additive inverse property: )

                        (Divide each side by )

                                  (Divide each side by )

Find the value.

                                  (Sales price)

            (Substitute )

               (Distributive property: )

(Subtract from each side)

                                     (Apply additive inverse property: )

                   (Multiply each side by )


Therefore, they sold T-shirts.

They sold T-shirts.


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