Coordinates 83482

I have a point A=[2,1] and a line y+x-5=0. How do I determine the coordinates of point A', which is the image of point A according to the given straight line?

Correct answer:

x2 =  4
y2 =  3

Step-by-step explanation:

y2=Ay+2 Sy=1+2 2=3

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