Expand and simplify 3(2x + 5) – 2(x – 4)

Firstly, to expand an equation like this, you must multiply the brackets by the number outside of the brackets. Make sure that you multiply every number inside the bracket by the number directly outside, and remember the signs:

3(2x + 5) - 2(x-4) becomes

(3 x 2x) + (3 x 5) + (-2 x x) + (-2 x -4) = 

6x + 15 - 2x + 8 (remember that '-' x '-' = '+')

Then you need to do something called 'collecting the like terms'. This means collecting together all the 'x' terms and all of the 'number' terms, like this:

6x + 15 - 2x + 8 becomes

(6x - 2x) + (15 + 8), working this out means the answer is:

4x + 23

Answered by Anna K. Maths tutor

75508 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

'There are two adults and two children in the Adams family. They buy an all-day travel ticket for each person. The price is £8 for each adult and £5 for each child. They also buy 4 ice-creams at £1.95 each. How much do they spend in total?'


express (2x^2-3x-5)/(x^2+6x+5) in the form (ax+b)/(cx+d)


Expand and simplify (x − 4)(2x + 3y)^2


There are 300 passengers on a plane, 7/20 of them are men, 30% are women, the rest are children. Work out the number of children.


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo
Cookie Preferences