Pair of Linear Equations in Two Variables question bank (Maths)

Aftab tells his daughter,"Seven years ago,$I$ was seven times as old as you were then. Also,three years from now,$I$ shall be three times as old as you will be." Represent this situation algebraically and graphically.

The coach of a cricket team buys $3$ bats and $6$ balls for ₹ $3900$. Later,she buys another bat and $3$ more balls of the same kind for ₹ $1300$. Represent this situation algebraically and geometrically.