A pair of linear equations which has a unique solution x = 2 and y = - 3 is


If x = 2 and y = - 3 is a unique solution of any pair of equation, then these values must satisfy that pair of equations.

Putting the values in the equations for every option and checking it -


From option (b).


LHS = 2x + 5y = 2(2+(- 3) = 4 + (- 15) = - 11 = RHS


and


LHS = 4x + 10y = 4(2) +10(- 3) = 8 + (- 30) = - 22 = RHS


It satisfies the pair of linear equation and hence is the unique solution for the equation.

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