Mathematics Research

Respondent
Name: Yohannes Dwi Adi
Class: VIII
School: SMP Pangudiluhur 1 Yogyakarta
Address: Blunyahrejo, TR II/962 Yogyakarta
Time: 19.45 pm
Category of Question: easy
Question:
The price of two shirt and three T-shirt are Rp85.000,00, eventhough the price of three shirt and one T-shirt with similar type are Rp75.000,00. Mention the price of one shirt and one T-shirt?
The answer:
Example:
The price of one shirt = x
The price of one T-shirt = y, and then:
The equalition system are 2x + 3y = 85.000 and 3x + y = 75.000
3x + y = 75.000 y = 75.000 – 3x
Subtitution :
2x + 3y = 85.000
2x + 3 (75.000 – 3x) = 85.000
2x + 225.000 – 9x= 85.000
−7x = 85.000 – 225.000
−7x = – 140.000
x = 20.000
y = 75.000 – 3x
y = 75.000 – 3 (20.000)
y = 75.000 – 60.000
y = 15.000

The result is, the price of one shirt = Rp20.000,00 and the price of one T-shirt = Rp15.000,00

Interview:
Anggri : How about you, the mathematics question above is easy?
Adi : Yes, mathematics question above is easy.
Anggri : In your oppinion, the mathematics is difficult?
Adi : Sometimes
Anggri : Why you like mathematics?
Adi : I like mathematics because the teacher teach mathematics attractive and explain and mathematics problem is challenge to solve.
Anggri : What a factor to making hard of mathematics items is sometime?
Adi : There is three a solution is factor of mathematics items, teacher, and student.
Anggri : When a linear equation of system items 2 variable given?
Adi : Class seven, semester 1.
Anggri : In your oppinion, what mathematics learn to benefit?
Adi : Mathematics learn to benefit is assisting brain in order not to be slow to think and can application in daily lives.
Anggri : what do you made if your mathematics value less or bad?
Adi : Listen teacher while teach mathematics and ask if not explain and Learning together.

The obtained of data to observation to student of junior high school, there are reason of attitude in mathematics. A student the express that hard mathematics sometime because basically he have taken a fancy to mathematics and assume that mathematics of something that challange to be finished. In this case factor having an effect on internal factor of itself. He also say that there is three factor which influence difficulty of mathematics him that is from in mathematics, teacher, and student. Mathematics learn to benefit is assisting brain in order not to be slow to think and can application in daily lives. If get mathematics value less or bad, he will listen teacher while teach mathematics and ask if not explain and Learning together.