What is the value of X in this triangle?

x = 3

Step-by-step explanation:

An equilateral ∆ has equal side lengths and all its angles are also equal to each other, which are 60° each.

The ∆ given has equal side lengths. Therefore it is an equilateral ∆ having equal angles, each would measure 60°.

Thus:

(25x - 15) = 60°

Solve for x

25x - 15 = 60

Add 16 to both sides

25x - 15 + 15 = 60 + 15

25x = 75

Divide both sides by 25

25x/25 = 75/25

x = 3

the least common denominator is 40

because they could drop even lower..