Question

Which among the following doesn’t have (-1,3) as a solution?

• A. x+2y=5
• B. x-2y+7= 0
• C. 5x+3y-9=0
• D. None of these

Answer 1

The correct option is C

5x+3y-9=0

If a given point is the solution of the linear equation in two variable, then it satisfies the equation.

Substitute $x=-1,y=3$ in the given equation

$5x+3y-9=0$

$LHS=5(-1)+3\left(3\right)-9$

$LHS=-5+9-9=-5\ne 0$

$\Rightarrow LHS\ne RHS$

If $x=-1,y=3$ is substituted in x-2y+7= 0 ; we get -1-6 + 7 = 0 satisfies the given equation

If $x=-1,y=3$ is substituted in x+2y=5 ; we get -1+ 6 = 5 satisfies the given equation

$\therefore$ (-1,3) is not a solution of the given equation.