+0  
 
+1
324
2
avatar+544 

https://vle.mathswatch.co.uk/images/questions/question512.png

really need help

prize for who answers this: i will like all your posts.smiley

ask CPhill i liked his posts.

lynx7  Nov 18, 2017
edited by lynx7  Nov 18, 2017
 #1
avatar+7155 
+3

Rearrange  w  =  3(2a + b ) - 4  to make  a  the subject.

 

w  =  3(2a + b) - 4

                                    Add  4  to both sides of the equation.

w + 4  =  3(2a + b)

                                    Divide both sides of the equation by  3 .

(w + 4)/3  =  2a + b

                                    Subtract  b  from both sides.

(w + 4)/3 - b  =  2a

                                           Divide both sides by  2 .

[ (w + 4)/3 - b ] / 2  =  a

 

a  =  [ (w + 4)/3 - b ] / 2

hectictar  Nov 18, 2017
 #2
avatar
+4

Solve for a:
w = 3 (2 a + b) - 4

 

w = 3 (2 a + b) - 4 is equivalent to 3 (2 a + b) - 4 = w:
3 (2 a + b) - 4 = w

 

Expand out terms of the left hand side:
-4 + 6 a + 3 b = w

 

Subtract 3 b - 4 from both sides:
6 a = 4 - 3 b + w

 

Divide both sides by 6:
a = 2/3 - b/2 + w/6

Guest Nov 18, 2017

5 Online Users

New Privacy Policy

We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive information about your use of our website.
For more information: our cookie policy and privacy policy.