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

Answered by Abisayo A. Maths tutor

4620 Views

See similar Maths 11 Plus tutors

Related Maths 11 Plus answers

All answers ▸

A sunflower is one hundred and fifty centimetres tall. How tall will it be if its height increases by ten per cent?


How to divide or multiply by 10s, 100s, 1000s


How many thirds are there in 9?


How much would Jodie earn?


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