Question

perimeter: find the value of x so that the triangles have the same perimeter
p=5,x-5,x-4
p=16,10,x-10

Answer 1

set them equal to eachother

Answer 2

5+x-5+x-4 = 16+10+x-10

Answer 3

2x-4=x+16

Answer 4

okay, we got that far, we got x=20 but they are not equal

Answer 5

ok one sec

Answer 6

Yes they are equal.
With x = 20, the triangles are: 5, 15, 16 and 16, 10, 10.
Both add up to 36 (perimeter)

Answer 7

ya they are equal

Answer 8

omg nice thx

Answer 9

The triangles are not equal but their perimeters are equal.

Answer 10

yw.

Answer 11

ok so dnt have to plug the 20 bk n2 the equation?

Answer 12

They are just asking for the x value and so you can stop it at x = 20.

But for verification purposes you can put x back, find the perimeter of each triangle and make sure they are equal so you will know you have the right answer x = 20.