Is that the Algebra work/practice book? If so, go into algebra nation and they have videos where they go step by step through the questions. Hope this helps?
Given 3a/(a+1)^2
To make the denominator a cube, you would have to multiply by 1 or (a+1)/(a+1)
yielding 3a(a+1)/(a+1)^3
(3a^2 + 3a) is the equivalent numerator
1 (Steven) + 3 sisters = 4
They each recieve, 1/4,2/8 or 2 slices of the pizza
First you add seven to both sides to 2/3x - 7 = 11 will be 2/3x = 18 then you divide by 2/3 on both sides to get x by itself so 2/3x = 18 and x will be 1/27 in fraction form
