How do you solve the simultaneous equation, 7x – 20 = 3x + 4?

To solve this equation we want to find the value of one unknown, x. The solution will be x = ___. So first we need to put all the terms with x on one side of the =, and all the constants on the other side. To balance the equation, any operation we do, we have to do to both sides I would start by subtracting 3x from both sides, 7x – 20 – 3x = 3x + 4 -3x, 4x – 20 = 0 + 4 Then I would add 20 to both sides 4x – 20 + 20 = 4 +20, 4x = 24 Finally, to find the value of x, I would divide both sides by 4 x = 24

AA
Answered by Abisayo A. Maths tutor

4663 Views

See similar Maths 11 Plus tutors

Related Maths 11 Plus answers

All answers ▸

There are 45 pupils in a class, 1/9 travel to school by train, 2/5 travel to school by car, 2/9 take the bus. Find how many students walk


When a fifth of the class is absent, there are 24 pupils present. What is the total number of pupils in the class?


Multiply 1/4 by 1/8


The function f is defined by f (x) = e ^(x+2), where x is any real number. Find f ^-1(x) and state its domain.


We're here to help

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

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences