Question

Help! I don’t understand 7 & 8!

Answer 1

For both of these, we simply need to make w and x the subject.

7. V = lwh

    Divide lh on both sides to get w by itself,
   
    $\frac{V}{lh}$ = w
    w = $\frac{V}{lh}$

8. Ax + By = C
    Ax = C - By

    Divide A on both sides to get x by itself
 
    x = $\frac{C - By}{A}$

Hope this helped! Ask me if there's any part of the working you don't understand :)

Answer 2

7., v =lwh

you divide both sides by lh to get w by itself