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

4945 Views

See similar Maths 11 Plus tutors

Related Maths 11 Plus answers

All answers ▸

Forty-seven thousand, nine hundred and eighty-three people went to a football match. What is this number rounded to the nearest thousand?


Multiply 1/4 by 1/8


The size of two of the three angles in a triangle are 40 degrees and 70 degrees. What is the special name given to this triangle?


How many quarters are there in 8?


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