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Q.

Find the roots of the equation:  1x+4-1x7=1130, x- 4 , 7

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a

x = 1 or x = 3

b

x = 1 or x = 2

c

x = 4 or x =1

d

x = 3 or x = 5

answer is A.

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Detailed Solution

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Given, 1x+41x7=1130 

x7x+4x7x+4=1130 

11x23x28=1130 

x23x28=30 

x23x+2=0 

x2x2x+2=0 

(x1)(x2)=0 

x=1 or x=2 

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