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Question

The value of x is ____ if (3x+1):(5x−4) is the duplicate ratio of 5:6

A
2
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B
4
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C
8
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D
6
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Solution

The correct option is C 8
(3x+1):(5x4) is the duplicate ratio of 5:6.
Also, the duplicate ratio of 5:6 is 52:62=25:36
3x+15x4=2536
108x+36=125x100
125x108x=36+100
17x=136
x=13617=8

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