Together 3598

Adam, Boris, and Cyril have CZK 21 together. Adam and Boris together have CZK 11 and Boris with Cyrillic CZK 13. Adam has. ... ..CZK, Boris. ... ... CZK and Cyril. ... .CZK.

Correct answer:

a =  8
b =  3
c =  10

Step-by-step explanation:


a+b+c=21
a+b=11
b+c=13

a+b+c = 21
a+b = 11
b+c = 13

Row 2 - Row 1 → Row 2
a+b+c = 21
-c = -10
b+c = 13

Pivot: Row 2 ↔ Row 3
a+b+c = 21
b+c = 13
-c = -10


c = -10/-1 = 10
b = 13-c = 13-10 = 3
a = 21-b-c = 21-3-10 = 8

a = 8
b = 3
c = 10

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