1 a. If x=6a+3 and a is 4 what is x? b. Make a the subject of the formula.

1a. a=4 Substitute the number into the equation x= (6 x 4) + 3= 24 + 3= 27
b. We need to isolate a So minus three from both sides to start with (what you do to one side you must do to the other, otherwise you are changing the equation)x-3=6aTo move the 6 divide both sides by 6, because 6/6 is 1 so just leaves a (x-3)/6=a

EW
Answered by Emma W. Maths tutor

2755 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

how do ratios work


Solve these simultaneous equations 5x + y = 21, x- 3y = 9


The equation of a curve is y = x^2 + ax + b where a and b are integers. The points (0,-5) and (5,0) lie on the curve. Find the coordinates of the turning point of the curve.


What is a limit


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