Answer:
your y intercept is 90 and the equation would be y= 90 and x is unknown
We will check if y and 60cm are parallel.
If the lengths 28cm, 56cm and 15cm, 30cm are in proportion, then y and the segment 60cm are parallel.

OK. We know: y and 60cm are parallel. Therefore we have equation:

<h3>Answer: y = 90 cm.</h3>
X+93=4x *vertical angles are congruent*
93=3x
x=31
Cross multiply then solve the equation.