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Elimination Method of Finding Solution of a Pair of Linear Equations

Question 37St...

Question

Question 37

State whether the following statement is true (T) or false (F).

The number of boys and girls in a class are in the ratio 5:4. If the number of boys is 9 more than the number of girls, then number of boys is 9.

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Solution

False
Let the number of boys be 5x and the number of girls be 4x.
According to the equation,
5x-4x=9
$\Rightarrow x = 9$
Hence,number of boys= $5 \times 9 = 45$

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Elimination Method of Finding Solution of a Pair of Linear Equations

Standard X Mathematics

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