Traditional Culture Encyclopedia - Traditional stories - In order to promote the traditional culture of the Chinese nation, a school organized a "poetry contest", and for the winning students to buy a pen and notebook as a prize. 1 signatures

In order to promote the traditional culture of the Chinese nation, a school organized a "poetry contest", and for the winning students to buy a pen and notebook as a prize. 1 signatures

(1) set the unit price of the pen for x yuan, the unit price of the notebook for y yuan.

Then the system of equations can be

x+2y = 8.5

2x+3y = 13.5

Solve for

x=1.5

y=3.5

Answer: The unit price of the signing pen is $1.5 and the unit price of the notebook is $3.5.

(2) Let there be z students who won the prize in the school.

Then the equation

720

720÷0.8

z+12

Solve for z=48.

The test shows that z=48 is consistent with the question.

Answer: 48 students won the award in the school.