Answer:
x = 20
Explanation:
Angle 2 and Angle 5 are corresponding angles
Corresponding angles are congruent
If angle 2 = 3x - 20 and angle 5 = x + 20
Then 3x - 20 must equal x + 20 ( because corresponding angles are congruent )
Notice that weve just created an equation that we can use to solve for x
We now solve for x using the equation we created
3x - 20 = x + 20
Step 1 add 20 to both sides
3x = x + 40
Step 2 Subtract x from both sides
2x = 40
Step 3 divide both sides by 2
x = 20