Question 32: Find the natural number x known \(\begin{array}{l} \frac{{x – 1}}{{10}} = \frac{4}{5} \end{array}\)
\(\begin{array}{l} \frac{{x – 1}}{{10}} = \frac{4}{5}\\ 5.\left( {x – 1} \right) = 10.4 \\ 5\left( {x – 1} \right) = 40\\ x – 1 = 40:5\\ x – 1 = 8\\ x = 8 + 1\\ x = 9 \end{array}\ )
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