Answer:
60
Explanation:
4(7x - 8.1) = 3(10x - 13)
Distribute:
28x - 32.4 = 30x - 39
+32.4 +32.4
28x = 30x - 6.6
-30x -30x
-2x = -6.6
/-2 /-2
x = 3.3
Now that we've found the value of x, let's plug in the value for each shape:
square = 4(7x - 8.1)
square = 4(7(3.3) - 8.1)
square = 4(23.1 - 8.1)
square = 4(15)
square = 60, the perimeter of the square is 60.
square's perimeter = triangle's perimeter
triangle = 60
Given that both the perimeters of the two shapes are the same, the triangle and square have a perimeter of 60.