9-12+5-{+1}+3-12-8-6-4 equal to..

9-12+5-{+1}+3-12-8-6-4 is equal to 3

Step-by-step explanation:

9-12 + 5 - (+ 1) + 3-12-8-6-4

9-12 + 5-1 + 3-12-8-6-4

3 + 5-1 + 3-12-8-6-4

8 -1 + 3-1-12-8-6-4

9 + 3-1-12-8-6-4

12-1-12-8-6-4

11-12-8-6-4

1-8-6-4

7-6-4

1-4

3

May I please have brainliest?

Thank you and stay safe

for the friend request.

when a figure, such as triangle (xyz) is reflected over the line y = x to create x'y'z' the x-coordinates and y-coordinates of the original image (pre-image) will be reversed for the image. (e.g., (x, y) > (y, x)) this means that the pre-image position of the x- and y-coordinates switch places which in turn provides a mirror like image of the original xyz.  

i notice that when i draw a line segment from x to x', that the points are parallel from each other -- they are exactly across from each other and do not intersect with any other points.  

yes, think i would see the same characteristic if you drew the line segment connecting y with the reflecting line and then y' with the reflecting line because of the essence of reflections. because it is a mirror image, each point was effected the same way which leads me to conclude that they same would apply to y and y'.