Potatoes bags

I have three bags with 21 kg potatoes. The first bag is 5.5 kg more than in the second bag, and the third is 0.5 kg more than in the second bag. Determine how many kgs of potatoes are in each bag.

Correct answer:

a =  10.5
b =  5
c =  5.5

Step-by-step explanation:


a+b+c=21
a = b+5.5
c = 0.5 +b

a+b+c = 21
a-b = 5.5
b-c = -0.5

Row 2 - Row 1 → Row 2
a+b+c = 21
-2b-c = -15.5
b-c = -0.5

Row 3 - 1/-2 · Row 2 → Row 3
a+b+c = 21
-2b-c = -15.5
-1.5c = -8.25


c = -8.25/-1.5 = 5.5
b = -15.5+c/-2 = -15.5+5.5/-2 = 5
a = 21-b-c = 21-5-5.5 = 10.5

a = 21/2 = 10.5
b = 5
c = 11/2 = 5.5

Our linear equations calculator calculates it.



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Showing 3 comments:
Math student
A boarding needs 75kg of potatoes to feed 250 learners.How many kg of potatoes needed to feed 600 learners?

1 year ago  2 Likes
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9 months ago  1 Like




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