The x-value of the given point is:
x = (2√6)/5
How to find the value of x?
We know that the equation of the shown circle is:
x² + y² = 1
And we want to find the x-value of the point (x, -5/7) which we know that lies on the circle.
Replacing y by -5/7 in the equation wewill get:
x² + (-5/7)² = 1
x² + 25/49 = 1
x = √(1 - 25/49)
x = √(24/25)
x = √4*√6/(5)
x = (2√6)/5