Solve 2x+1=11

When faced with a question like this, the aim is to work out the value of "x". What this question basically means is "what number can we multiply by 2 and add 1 onto it to get 11. There a few methods to tackle this question, one of which involves taking away the numbers from one side and adding them to the other whilst leaving the x on the other side, followed my dividing through by the coefficient of x, giving x = 5.Another method is to construct a number line and mark the number 11 on it, then from 0 we can draw one jump to 1, then we know the rest of the space between 1 and 11 represent the value of 2x. So 2x = 10 and from this we can work out that x = 5 (This method makes much more sense when drawn out).

MI
Answered by Molly I. Maths tutor

7760 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Solve the simultaneous equations: 2x + y = 18, x - y = 6


How do signs change in an inequality?


Katie wants to buy 4 adult show tickets for £10 each and 2 child show tickets for £3 each. There is a 10% booking fee and 3% is then added for paying by credit card. Work out the total charge for Katie if she pays with a credit card.


How to find the gradient of a line?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning