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# Find the Value of X, If: (2x + 1): (3x + 13) is the Sub-duplicate Ratio of 9: 25. - ICSE Class 10 - Mathematics

#### Question

Find the value of x, if: (2x + 1): (3x + 13) is the sub-duplicate ratio of 9: 25.

#### Solution

(2x + 1): (3x + 13) is the sub-duplicate ration of 9 : 25

Sub-duplicate ratio of 9 : 20 = 3 : 5

(2x + 1)/(3x + 13) = 3/5

10x + 5 = 9x + 39

10x - 9x = 39 - 5

x = 34

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#### APPEARS IN

Selina Solution for Selina ICSE Concise Mathematics for Class 10 (2018-2019) (2017 to Current)
Chapter 7: Ratio and Proportion (Including Properties and Uses)
Ex.7D | Q: 5.2

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Solution Find the Value of X, If: (2x + 1): (3x + 13) is the Sub-duplicate Ratio of 9: 25. Concept: Ratios.
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