matematyka z plusem do 2 gim zad 4 str 99
przykłady a c e
Rozwiąż układy równań
a / Klamra -3x = 12
--- x-y=1
c/ klamra - 4 y - x = 6
-- 17y = 0
e/ klamra u = 4 v
----- 5u - v= 10
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-3x = 12
x-y = 1
-x=4
-4-y=1
x=-4
-y=5
x=4
y=-5