Y=[ ? ]°
what’s y equal

y = 42

Step-by-step explanation:

if we need to find the value of y we need to

y + 90 + 48 = 180 (angle sum property of triangle and we used 90 here because the line which is crossing and y and z's line is 90 hence the other side of the line will also be 90)

y + 138 = 180

y = 180 - 138

y = 42

We can even cross-check by placing the value of 42 instead of y

42 + 90 + 48

42 + 138

= 180

Hence proved y = 42

since both sides equal, there are infinitely many olutions.