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Q.

Solve the equation 9x 7−6x =15   .


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a

25 7  

b

3 2  

c

35 33  

d

15 2   

answer is C.

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Detailed Solution

It is given 9x7-6x=15.
Using cross multiply method,
⇒ 9x 7−6x =15 ⇒9x=15× 7−6x ⇒9x=105−90x  
Solve for x,
⇒9x+90x=105 ⇒99x=105 ⇒x= 105 99  
The value of x is 35 33  .
Correct option is 3.
     
 
 
 
 
 
 
 
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