All you do is add the numbers and that is how you get your answer!
1/6 for the first question and 1/3 for the second
X = 13
( x + 4) / 51 = (2x - 7) / 57
585 = 45x
585/45 = 45x/45
x = 13
The reciprocal of 7 is 1/7, reciprocal of 8 is 1/8, and reciprocal of 9 is 1/9
Where’s point P at though