The bakery

The bakery delivered 60 kg of bread to the store. The bread weighed 1 kg and 2 kg, a total of 35 pieces. How many loaves weighed 1 kg, and how many were two-kilo loaves?

Correct answer:

a =  10
b =  25

Step-by-step explanation:


60 = 1a+2b
a+b = 35

60 = 1·a+2·b
a+b = 35

a+2b = 60
a+b = 35

Row 2 - Row 1 → Row 2
a+2b = 60
-b = -25


b = -25/-1 = 25
a = 60-2b = 60-2 · 25 = 10

a = 10
b = 25

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