For three days the store sold 1400 kg of potatoes. The first day they sold 100 kilograms of potatoes less than the second day, the third-day three-fifths of what they sold the first day. How many kgs of potatoes sold every day?

Correct answer:

a =  500
b =  600
c =  300

Step-by-step explanation:

a = b-100
c = 3/5•a

a+b+c = 1400
a-b = -100
3a-5c = 0

a = 500
b = 600
c = 300

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