Find the values of the variables. then find the side lengths of the square. need x=_ , y=_ and the length of the square is _

x = 4; y = 9; length of a side = 5

Here, you're expected to use the fact that all of the sides of a square are the same length.

The left and right sides both have different expressions only in y, so it is convenient to equate them.

... y -4 = 2y -13

... 0 = y -9 . . . . . subtract the left side

... 9 = y . . . . . . . add 9

This tells us the side of the square (s) is ...

... s = y -4 = 9 -4

... s = 5

And we can use this to find x.

... 5 = 2x -3 . . . . equate the x-expression to the square side length

... 8 = 2x . . . . . . add 3

... 4 = x . . . . . . . . divde by the coefficient of x

x and y are 4 and 9; the square side length is 5.

d

step-by-step explanation:

i used the pitagoras theoreme