Solve 3(x-2)=21

This question can be solved in two ways. One way is to divide the whole equation, both sides by 3, which gives x-2=7. Then add 2 to both sides to give x=9. Another way is to work out the left hand side of the equation first, which gives 3x-6=21. Then add 6 to both sides to give 3x=27. x can then be worked out by 27/3=9.

XY
Answered by Xuexin Y. Maths tutor

3273 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Show that (x + 1)(x + 2)(x + 3) can be written in the form ax3 + bx2 + cx + d where a, b, c and d are positive integers.


Differentiate the following: 5x^3 + 4x^2 + 3x + 2


solve 125^(1/3)*2^(-3)


How do you find the turning point of a quadratic equation?


We're here to help

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

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences