what is an equation that can be used to solve for x

The equation is : x + 48 = 128
The value of x: x = 80°
Explanations:Note that:
Alternate angles are equal
Sum of angles on a straight line is 180°
52 + y = 180 ( Sum of angles on a straight line is 180)
y = 180 - 52
y = 128
Note that Alternate angles are equal
y = x + 48
128 = x + 48
The equation that can be used to solve for x is:
x + 48 = 128
Solving for x:
x = 128 - 48
x = 80°