SOLUTION: https://answers.yahoo.com/question/index?qid=20200126205659AALFUVV

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Question 1151668: https://answers.yahoo.com/question/index?qid=20200126205659AALFUVV
Found 2 solutions by greenestamps, MathLover1:
Answer by greenestamps(13200) About Me  (Show Source):
You can put this solution on YOUR website!

          pounds  percent  pounds of chips
          ----------------------------------
 old mix    12      10      .10(12) = 1.2
  added      x     100      1.00(x) = x
          ----------------------------------
 mixture  12+x      25            .25(12+x)

Make the equation showing the numbers of pounds of chips in the two ingredients and the mixture:

x%2B1.2+=+.25%2812%2Bx%29
x%2B1.2+=+3%2B.25x
.75x+=+1.8
x+=+1.8%2F.75+=+2.4

ANSWER: add 2.4 pounds of banana chips

Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!
Equation:
chips + chips = chips
0.10%2A12+%2B+x+=+0.25%2812%2Bx%29
Multiply thru by 100 to get:
10%2A12+%2B+100x+=+25%2A12+%2B+25x
-----
75x+=+15%2A12
x+=+%281%2F5%2912
x+=+2.4lbs (amt. of banana chips to be added)

10%=0.10
25%=0.25
pounds..... | .....percent|..... pounds of+chips
old+mix...|.....12lbs%2A0.10|..... 1.5
add+b.c ..|.....2.4+%2A+1 .....|.....+2.4
new+mix .....|.....14.4+%2A0.25 .....|.....+3.6