Answer:
38 cm.
Step-by-step explanation:
Two sides are equal ( as its an isosceles triangle). so:
3x - 5 = 19 - x
3x + x = 19 + 5
4x = 24
x = 6.
So the perimeter
= 3x - 5 + 19 - x + 2x
= 3(6) - 5 + 19 - 6 + 2(6)
= 18 - 5 + 19 - 6 + 12
= 49 - 11
= 38 cm.
