Question

See attachment

Answer 1

this question is product of the intercepts of intersecting chords are equal

\[2.5 \times(x - 3.6)=1.6\times x\]

expand and simplify

then solve for x

Answer 2

That's the same theorem as earlier.

x(1.6) = 2.5 ( x - 3.6)
x*(1.6) = 2.5* ( x - 3.6)
1.6x = 2.5x - 9
-.9x = -9
x = 10