What is the value of the expression shown below, given the three equations?

From the first equation, three triangles sum to 30.

$$\triangle + \triangle + \triangle = 30$$ $$3 \times \triangle = 30$$ $$\triangle = \frac{30}{3}$$ $$\triangle = 10$$

Substitute the value of $\triangle$ into the second equation.

$$\triangle + \square + \square = 20$$ $$10 + 2 \times \square = 20$$ $$2 \times \square = 20 - 10$$ $$2 \times \square = 10$$ $$\square = \frac{10}{2}$$ $$\square = 5$$

Substitute the value of $\square$ into the third equation.

$$\square + \bigcirc + \bigcirc = 9$$ $$5 + 2 \times \bigcirc = 9$$ $$2 \times \bigcirc = 9 - 5$$ $$2 \times \bigcirc = 4$$ $$\bigcirc = \frac{4}{2}$$ $$\bigcirc = 2$$

Substitute the values of $\bigcirc$, $\triangle$, and $\square$ into the final expression, remembering the order of operations (multiplication before addition).

$$\bigcirc + \triangle \times \square = ?$$ $$2 + 10 \times 5$$ $$2 + 50$$ $$= 52$$

The final answer is $\text{52}$.