1 ) сократите дробь
(x^2+2х)/7х
2) решите систему уравнений
3*x+y = 13
4*x-y = 15
(x^2+2х)/7х
2) решите систему уравнений
3*x+y = 13
4*x-y = 15
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1 ) сократите дробь(x^2+2х)/7х=х(х+2)/7ч=х+2/7
2) решите систему уравнений
3*x+y = 13
4*x-y = 15
у=13-3х
у=4х-15
13-3х=4х-15
-7х=-28
х=28/7=4