Solve for x: angles on a straight line
Angles on a straight line add to 180°. Write an equation and solve for x.
Loading a question…
You've done today's 10 free questions.
Come back tomorrow for 10 more, or get unlimited practice with a membership.
Want more today? Print 20 more questions free, with the answers.
Already a member? Sign in.
See worked examples
Two angles on a straight line measure (x + 30)° and (5x − 6)°. Find x.
Answer: 26
Two angles on a straight line measure (3x + 9)° and (3x + 9)°. Find x.
Answer: 27
Two angles on a straight line measure (4x − 7)° and (5x − 38)°. Find x.
Answer: 25
Tip: Angles on a straight line add to 180°. Write an equation and solve for x.
Print a worksheet of this skill New questions and an answer key, free.
Up next
- Next in this topic Number of diagonals of a polygon Grade 8
- Need a warm-up? Complementary angles Grade 7
Print a free worksheet with answers (20 questions).
Practise without limits
Members practise as much as they like, every day, and get the printable packs and lessons too.