10th Class Mathematics Pair of Linear Equations in Two Variables Question Bank MCQs - Pair of Linear Equations in Two Variables

Which of the following is not a solution of the equation \[3x+2y=5\]?

A) \[x=1,\,y=1\]

B) \[x=3,\,y=-2\]

C) \[x=-1,\,y=4\]

D) \[x=1,\,y=-2\]

Correct Answer: D

Solution :

[d] The given equation is \[3x+2y=5\]

[a] \[LHS=3(1)+2(1)=5=RHS\]

[b] \[LHS=3(3)+2(-2)=5=RHS\]

[c] \[LHS=3(-1)+2(4)=5=RHS\]

[d] \[LHS=3(1)+2(-2)=-1\ne RHS\]

\[\therefore \,\,\,\,\,x=1,\,\,y=-2\] is not the solution of the given equation.