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Afla numarul necunoscut:824-240:y=800. 245+50xy=745. yx6:9=32

Răspuns :

824-240÷y=800
824-n=800
n=824-800
n=24
240÷y=24
y=240÷24
y=10


245+50xy=745
245+n=745
n=745-245
n=500
50xy=500
y=500÷50
y=10