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Q.

The value of y at x = -1 in the equation 5y = 2 is:


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a

5 2  

b

2 5  

c

10

d

0 

answer is B.

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Detailed Solution

The given equation is 5y=2  . Here, the given equation has no x  variable.
So, we can also write the equation as 0x+5y=2  , then it will remain the same whether we put any value of x  .
Now,
If we solve the equation 0x+5y=2   for x = -1, we get,
⇒0 −1 +5y=2.  
⇒5y=2.   ⇒y=25.
Therefore, the value of y at x = -1 in the equation 5y = 2 is 2 5  .
Hence, the correct option is 2.
 
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