Proszę o szybka odpowiedź oraz dokładne obliczenia :
y=(21-6x)/5
(21-6x)/5=0
21/5-6x/5=0
21/5=6x/5 /*5
21=6x
x=21/6
x=3,5
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y=(21-6x)/5
(21-6x)/5=0
21/5-6x/5=0
21/5=6x/5 /*5
21=6x
x=21/6
x=3,5