$x=-1$ and $y=-2$ is one of the solutions of the equation $\ldots \ldots \ldots \ldots$

The graph of the pair of equations $x+y=7$ and $3x+3y=21$ is:

The solution of $x + y - 1 = 0$ and $2x + 2y - 5 = 0$ is ...........

Ankita travels $14 \,km$ to her home partly by rickshaw and partly by bus. She takes half an $hour$ if she travels $2 \,km$ by rickshaw and the remaining distance by bus. On the other hand,if she travels $4 \,km$ by rickshaw and the remaining distance by bus,she takes $9 \,minutes$ longer. Find the speed of the rickshaw and of the bus (in $km/h$).

The pair of equations $x + 2y + 5 = 0$ and $-3x - 6y + 1 = 0$ have

Solve the following pair of equations: $2x + y = \frac{7xy}{3}, x + 3y = \frac{11xy}{3}$