Write and solve equations: supplementary angles
Write an equation that adds the two angles and sets it equal to the total, then 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 supplementary angles measure (4x)° and (2x + 12)°. Find x.
Answer: 28
Two supplementary angles measure (3x + 10)° and (2x + 25)°. Find x.
Answer: 29
Two supplementary angles measure (3x + 7)° and (x + 53)°. Find x.
Answer: 30
Tip: Write an equation that adds the two angles and sets it equal to the total, then solve for x.
Print a worksheet of this skill New questions and an answer key, free.
Up next
- Next in this topic Can a triangle have these side lengths? Grade 7
- Ready for more Corresponding angles and parallel lines Grade 8
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.