6divided by the sum of 4 times x and 5 times k

           6
=  
        4x + 5k

hope that helps

C. i think it is step 3

A. p = 2(l + w)p/2 - l = ww = p/2 - l b. while isolating the variable w in the equation, i first divided both sides by 2 and then i subtracted l from both sides. i hope this .