P = 4r + 3t
4r = p - 3t
r = (p - 3t)/4
So Sahra is 3 times as old as her daugter. That means that the sum of their age is the daughters age times 4.
We can prove that by saying the daughters age is x. Sahra's age must be 3x. Their sum must be x+3x = 4x.
So to get the daughters age we divide the sum by 4, which is 8.
When you say right of the point do you mean the positive side? If you are it can be 1,2,3,4,5,6,7,8,9,10.........
The first triangle does. That's the right answer.
