The cost of a book is one third the cost of a pen. Write a linear equation in two variables to represent this statement.
The cost of a book is one third the cost of a pen. Write a linear equation in two variables to represent this statement.
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Let, the cost of pencil = x,
and, the cost of a pen = y.
Then, ATQ
x=1/3y
=>3x=y
=>3x-y=0
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