решите систему уравнений 2x+y=5 3x-5y=1. Created by YaKrevedko1. algebra-ru

решите систему уравнений 2x+y=5 3x-5y=1...

Lesben Y=5-2x
3x-5(5-2x)=1,3x-25+10x=1
13x=26
x=2
y=5-2.2=5-4=1
y=1
/x,y/= /2,1/

15 votes Thanks 17

sirca $\left \{ {{2x+y=5} \atop {3x-5y=1}} \right. \\\\ \left \{ {{y=5-2x} \atop {3x-5(5-2x)=1}} \right. \\\\ \left \{ {{y=5-2x} \atop {13x=26}} \right.\\\\ \left \{ {{y=1} \atop {x=2}} \right.$

5 votes Thanks 13

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