Problem Solving with Linear and Non-Linear Equations

Is $x=\frac{7}{12}$x=712​ a solution of $x-\frac{4}{9}=\frac{17}{36}$x−49​=1736​?

Consider the relationship between the number of pink triangles $\left(p\right)$(p) and the number of columns $n$n.

A racing car starts the race with $120$120 litres of fuel. From there, it uses fuel at a rate of $3$3 litres per minute.