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Find a Number Whose Double is 45 Greater than Its Half. - Mathematics

Sum

Find a number whose double is 45 greater than its half.

 
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Solution

Let the number be x .
According to the question, 
\[2x = \frac{1}{2}x + 45\]
\[\text{ or }2x - \frac{1}{2}x = 45\]
\[\text{ or }\frac{4x - x}{2} = 45\]
or 3x = 90  [After cross multiplication]
\[\text{ or }x = \frac{90}{3}\]
or x = 30
Thus, the number is 30.

  Is there an error in this question or solution?
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APPEARS IN

RD Sharma Class 8 Maths
Chapter 9 Linear Equation in One Variable
Exercise 9.4 | Q 3 | Page 29
Selina Concise Mathematics Class 8 ICSE
Chapter 14 Linear Equations in one Variable
Exercise 14 (C) | Q 7 | Page 170
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