Question

chapater -linear equations in one variable word problem ​

Answer 1

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Answer 2

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Let the original number be x

According to the question :

$\frac{4}{5} x = x - 20 \\ \\ \frac{4}{5} x - x = - 20 \\ \\ \frac{4x - 5x}{5} = - 20 \\ \\ \frac{ - x}{5} = - 20 \\ \\ \frac{x}{5} = 20 \\ \\ x = 20 \times 5 \\ \\ x = 100$

Therefore the original number is 100.

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