Answer:
x = 5 (pleaaaaaase give branliest)
Step-by-step explanation:
An equilateral triangle is a triangle that has all congruent sides
This means that 30 = 4x + 10
30 - 10 = 4x
20 = 4x
20/4 = x
x = 5
Hope this helps
x=5
All sides are equal length because it is an equilateral triangle.
30 = 4x+10
Subtract 10 from each side
30-10= 4x+10-10
20 =4x
Divide each side by 4
20/4 = 4x/4
5 =x
