Question

The triangles are similar.

What is the value of x ?

Answer 1

The equation would be set up like this

100 = 6x + 28

25 times 4 (the constant of proportionality) is how you get 100

100-28 is 72 6x +28 - 28 is 6x

new equation, 72 = 6x

So then you'd divide 72 by 6 and get 12

x=12

Answer 2

It an example of above you could tell your teacher that the value of 5x6 is 30 or the value of x+y if x = 6 and y = 3 is 9 . Which refers to a variable or constant