The measurements of three sides of a triangle are 4l inches 5 inches and 7 inches it's an equal unknown amount is added the perimeter is 67 inches

Question

Find the dimensions of the triangle

Answer 1

Suppose "X" is added to each of the 3 sides

 

so, 4+X+5+X+7+X=67

3X + 16 = 67

X= (67-16)/3

X= 51/3 = 17 in

dimensions of the new triangle

side 1= 4+17=21

side 2= 5+17= 22

side 3= 7+17= 24