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