MYTUTOR SUBJECT ANSWERS

329 views

Solve this equation; 5x - 4 = 3x + 7

In order to solve equations of x it is necessary to move all the Xs over to one side and the other numbers over to the other side;

5x - 4 = 3x + 7

As 5x is greater than 3x it makes sense to subtract 3x from both sides so that any negative Xs are avoided, this changes the equation to:

2x - 4 = 7

The next step is to add 4 to both sides to cancel out the -4 on the left hand side;

2x = 11

Finally dividing both x and 11 by 2 will give the value of x; 

x = 11/2 or x = 5.5

*A key thing to remember when solving equations is whatever you do to one side you MUST do to the other, e.g. if you divide one side by 3 you must divide the other side by 3, or if you add 6 to one side you must add 6 to the other side. This ensures that the equation stays correct as both sides continue to equal each other.

Kate E. GCSE Psychology tutor, A Level Psychology tutor, GCSE Maths t...

7 months ago

Answered by Kate, a GCSE Maths tutor with MyTutor


Still stuck? Get one-to-one help from a personally interviewed subject specialist

460 SUBJECT SPECIALISTS

£18 /hr

Abhinav T.

Degree: Medicine (Other) - University College London University

Subjects offered:Maths, Physics+ 2 more

Maths
Physics
Chemistry
Biology

“Confirming understanding by verbal confirmation and communication so as to ensure clarity and confidence during the learning process and progression.”

MyTutor guarantee

PremiumImogen W. GCSE Chemistry tutor, GCSE Maths tutor, A Level Chemistry t...
£30 /hr

Imogen W.

Degree: Chemistry (Masters) - University College London University

Subjects offered:Maths, Chemistry

Maths
Chemistry

“I am very enthusiastic and patient. I want my students to be able to understand their studies so that they can enjoy them as much as I do.”

£20 /hr

Samuel J.

Degree: Physics (Masters) - Manchester University

Subjects offered:Maths, Physics

Maths
Physics

“Top tutor from the renowned Russell university group, ready to help you improve your grades.”

About the author

Kate E.

Currently unavailable: for regular students

Degree: Psychology (Bachelors) - Birmingham University

Subjects offered:Maths, Psychology

Maths
Psychology

“Who am I?  My name is Kate and I am currently in my first year studying BSc Psychology at the University of Birmingham. From 2009 to 2016 I attended Altrincham Grammar School for Girls and completed both my GCSEs and A Levels there; I ...”

MyTutor guarantee

You may also like...

Posts by Kate

Insert one pair of brackets so that this calculation is correct; 3 x 6 + 5 - 1 = 32

Solve this equation; 5x - 4 = 3x + 7

Other GCSE Maths questions

How do I solve the equation x^2 = 3x - 1 ?

How can I tell if two lines are perpendicular from the equations?

What is solution by substitution?

What's the inverse of the function f=x+2?

View GCSE Maths tutors

We use cookies to improve your site experience. By continuing to use this website, we'll assume that you're OK with this. Dismiss

mtw:mercury1:status:ok