Solve the Equation: Triangle Symbol + 25 = 30

To solve this problem, we need to find the value represented by the triangle symbol in the equation $\triangle + 25 = 30$. This involves a straightforward algebraic process.

First, we want to isolate the triangle by removing the 25 that is added to it. To do this, we will subtract 25 from both sides of the equation:

• $\triangle + 25 = 30$
• Subtract 25 from both sides: $\triangle + 25 - 25 = 30 - 25$

Simplifying both sides, we have:

• $\triangle = 30 - 25$
• $\triangle = 5$

Therefore, the value of the triangle is $5$.