Problems Involving Linear Equations in One Variable

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Maria is 6 years older than her brother. The sum of their ages is 38. How old is her brother?

16

A number increased by 15 equals 47. What is the number?

32

John bought 5 identical notebooks and a pen that costs 12 Baht. He spent a total of 212 Baht. How much does each notebook cost?

40

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