Answer:x=8
Step-by-step explanation:
The image shows an equilateral triangle
In geometry, an equilateral triangle is a triangle in which all three sides are equal, an equilateral triangle is also equiangular; that is, all three internal angles are also congruent to each other and are each 60°.In geometry, an equilateral triangle is a triangle in which all three sides are equal. In the familiar Euclidean geometry, an equilateral triangle is also equiangular; that is, all three internal angles are also congruent to each other and are each 60°.
Therefore,
(7x+4)°=60°.
7x+4=60
7x=60-4
7x=56
7x/7=56/7
x=8
