Question

simplfy( 4x over y^3) ^-3

Answer 1

solve for one variable at a time. start with y.

(4x/y3)-3=0
+3 +3
(4x/y3)=3

now multiply both sides by 1/4x to cancel the 4x on the top. like this:

(4x/3y) * 1/4x= 3/4x

3y=(3/4x)
/3 /3

y=(3/4x)/3

now take this and plug it back into the original problem for the y value to get your x. like this:

[(4x) / {(3/4x)/3} * 3] -3.

now solve that to get your x. then take your x value from that and plug it in to the original again to get your actual y value.