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Question

If (3,1) is a solution of the equation 6x+by=25, then what is the value of b?


  1. 193

  2. 7

  3. 6

  4. 8


Solution

The correct option is B

7


The solution to a linear equation in two variables is a set of values of x and y that satisfies the equation.

Substituting x=3 and y=1 in the equation 6x+by=25, we get
6(3)+b(1)=25
     18+b=25
             b=7
Thus, the value of b equals 7.

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