The cost of a notebook is twice the cost of a pen. Write a linear equation in two variables to represent this statement.
(Take the cost of a notebook to be Rs
and that of a pen to be Rs y).
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The cost of a notebook is twice the cost of a pen. Write a linear equation in two variables to represent this statement.
(Take the cost of a notebook to be Rs
and that of a pen to be Rs y).
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Formulate the following problems as a part of equations, and hence find their solutions.
Solve the following pairs of equations by reducing them to a pair of linear equations:
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Form the pair of linear equations in the following problems and find their solutions (if they exist) by any algebraic method:
Solve the following pair of linear equations by the substitution and cross-multiplication methods: