The given triangle is an <u>Equilateral Triangle</u> , meaning that <u>all three sides are of equal length</u> as well as all three angles being 60°. This simplifies the process of finding x since we can equal the equation to 60 and solve for x as a regular Algebraic equation.
.... add 4 to each sides
...... divide 7 from both sides
So we get x = 8
I hope this answered your question. If you have any more questions feel free to ask away at Brainly.