Math Problem Statement

Perbandingan harga buku . Harga pensil ⅔ kali spidol. Harga spidol ⅔ kali bolpoint. Harga bolpoint 2.000 lebih mahal dari pensil. Tentukan : a. Harga 2 buah pensil b. Selisih harga spidol dan bolpoint

Solution

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Math Problem Analysis

Mathematical Concepts

Proportions
Linear Equations
Substitution

Formulas

P = (2/3) * S
S = (2/3) * B
B = P + 2000
2P = 2 * (price of a pencil)
Difference = B - S

Theorems

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Suitable Grade Level

Grades 6-8