Kid-A A1,A2,A3,A4,A5
Kid-B B1,B2,B3,B4,B5
Kid-C C1,C2,C3,C4,C5
Kid-D D1,D2,D3,D4,D5
Ellen E1,E2,E3,E4,E5
1. Yes
2 idk wait let me see what I. Can do
4x+3+27=90
4x+30=90
90-30 =60
60/4 =15
X=15
I find the problem confusing because it forces a certain sequence of thought process, and I find I get way beyond these questions and answers rather quickly. I would start with the equation of part B, having already recognized the conversions of percent to decimal and the need to make the acid quantities add up. Doing the problem a different way gets you to the answer in part C without any of these "steps," so going back and trying to fill in the "steps" seems awkward, at best.
Perhaps the attachment here helps.