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Quantitative Aptitude :: Simplification - Discussion

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Choose the correct option.

If 9x-3y=12 and 3x-5y=7 then 6x-2y = ?

A5

B4

C2

D8

Answer: Option (Login/Signup)

Show Explanation

Solution: 9x-3y= 12 â‡’y=3x-4 
Putting this value in 3x-5y=7 â‡’ 3x- 5(3x-4)=7 â‡’  3x-15x 20=7  â‡’ 13=12x  â‡’x=13/12



Therefore y= -3/4



Putting value of x and y in the equation 6x-2y we get answer as 8.

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