Get an answer in 5 minutes

Ask a question to our educators
MATHS

# Use x for unknown numbers.I think of a number multiply it by two,then subtract nine?

take ‘x’ you are asked to multiply it by 2 giving you ‘2x’ then you are asked to take away 9 Giving you ‘2x-9’ I always substitute a number in to check that the equation works at the end

Rose Smith
·

1.1k students helped

Take the unknown to be ‘x’ and multiply it by 2. This gives you 2x,from which you are being asked to subtract 9. FINAL ANSWER 2X-9 This would be your final answer unless you’ve been asked to substitute and solve and equation. Hope I helped

DJ McNeish
·

578 students helped

Your unknown would be 'x' therefore the expression would be 2x - 9

·

1.5k students helped

## What is Q&A on Scoodle?

At Scoodle we understand that everyone learns in a different way. Some people learn through practice, using essays and notes; others prefer video lessons to watch and learn, some just need help with a specifically hard question, while some learn best 1-on-1 tutoring sessions. At Scoodle we cater for all types of learning styles and needs. From GCSE Maths video lessons to A-level English essays and specialist educators in every subject - we’ve got you covered.

Scoodle has helped over 131,000 students so far

Need help with Secondary Maths?

Getting expert help from a tutor is a great way to improve your Maths grades.

## Discover learning resources by tutors

Learn Maths with Video Lessons
1hr 28m · 8 videos
Paja Kruzikova
·

711 students helped

GCSE Maths - Numbers
28m · 3 videos
Iqbal Lokman
·

1.6k students helped

1hr 32m · 9 videos
Paja Kruzikova
·

711 students helped

GCSE Maths - Ratios
56m · 6 videos
Paja Kruzikova
·

711 students helped

GCSE Maths - Algebra A
1hr 14m · 7 videos
Paja Kruzikova
·

711 students helped

GCSE Maths - Algebra B
1hr 27m · 9 videos
Paja Kruzikova
·

711 students helped

GCSE Maths - Algebra C