Does anyone know how to do this?

So slope intercept for is y=mx+b
mx being the slope and the b being the y intercept
So you have to find the slope first which is 1/1 or 1
Now you have to find the y intercept which is where the line passes through the y line. The y intercept is 6.
So your the ANSWER IS:
y= -1x +6
(The one is negative because the slope is going down, or is it negative)

Hope this helps have a nice day!!! :

-2x + 7 = 7

subtract 7 from both sides.

-2x = 0

divide both sides by -2.

x = 0

the value of x is equal to 0.