Please help I don’t understand

Answer:
Line m and n are parallel lines that are intersected by a line
This means that corresponding angles in each line are equal to each other
This means that angle (3x+58) is equal to (5x)
now, we can solve for x and from there find the angle measure
(3x+58)=5x
3x-3x+58=5x-3x
58=2x
58/2=2x/2
29=x
if 29=x then 5(29)=5x
the angle measure of these angles is 145
Step-by-step explanation:
Answer:
Step-by-step explanation:
m // n and they are intersected by transversal.
Corresponding angles are equal
5x = 3x + 58
5x - 3x = 58
2x = 58
x = 58/2
x = 29