Hello,
Answer:
x = 20
Step-by-step explanation:
3x + 10 = 4x - 10
⇔ 4x - 3x = 10 + 10
⇔ x = 20
20
Since l ll m
( 3x + 10 ) and ( 4x - 10 ) are alternate exterior angles,
Property of parallel lines ( ll ) : -
Alternate exterior angles are equal.
4x - 10 = 3x + 10
4x - 3x = 10 + 10
