Evaluate expressions with fractional values for variables
Replace x with the given number everywhere it appears. Work out powers first, then multiply, then add or subtract.
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
f(x) = −2x − 9. Find f(4).
Answer: -17
f(x) = −5x + 1. Find f(1).
Answer: -4
f(x) = x − 5. Find f(−3).
Answer: -8
Tip: Replace x with the given number everywhere it appears. Work out powers first, then multiply, then add or subtract.
Print a worksheet of this skill New questions and an answer key, free.
Up next
- Ready for more Combine like terms with positive coefficients Year 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.