Third angle = 180-(60+60) = 60°
All the angles of the triangle are equal to 60 degrees, so the triangle is equilateral.
2x-3 = 4
2x = 4 + 3
2x = 7
x = 7/2
x = 3.5

TrinidadDirollo553

4 = 2x-3
7 = 2x
/2 /2
3.5 = x
(Proof x = 3.5)
4 = 2y+6
-2 = 2y
/2 /2
-1 = y
2(3.5) - 3 = 4
2(-1) + 6 = 4
4 + 4 + 4 = 12
(Because this is an equilateral triangle, all sides must equal 4)