Question

Write the condition for unique solution:

Answer 1

The general form for a pair of linear equations in two variables $x$ and $y$ is

$a_{1}x+b_{1}y+c_1=0$

$a_{2}x+b_{2}y+c_2=0$

We know that the condition of unique solution

$\frac{a_1}{a_2}\ne \frac{b_1}{b_2}$

Hence, this is the answer.