Matematyka z Plusem 2 zad,1 str. 99
pzykład C).
-x + 5y = 3
x + y = 3
-----------
6y = 6
y = 1
-x + 5 * 1 = 3
-x = 3 - 5
-x = - 2
x = 2
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-x + 5y = 3
x + y = 3
-----------
6y = 6
y = 1
-x + 5y = 3
-x + 5 * 1 = 3
-x = 3 - 5
-x = - 2
x = 2
x = 2
y = 1