Given: startfraction c over 2 endfraction minus 5 equals 7 step 1: startfraction c over 2 endfraction minus 5 plus 5 equals 7 plus 5 step 2: startfraction c over 2 endfraction plus 0 equals 12 step 3: startfraction c over 2 endfraction equals 12 step 4: 2 (startfraction c over 2 endfraction) equals 12 (2) step 5: c equals 24 choose the property that justifies each step of the solution.

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'.

you didn't give me the choices, so i will just give you the graph so you can look at your choices and choose the right one.

need more info

step-by-step explanation: