Układ równań ;))
x+3y=1
4x+y=5
Witam ,
x+3y=1|*-4\\4x+y=5\\
-4x-12y=-4\\4x+y=5\\ -11y=1\\ y=-1/11
y=-1/11
x+3*(-1/11)=1
x-3/11=1
x=1+3/11
x= 20/11
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Witam ,
x+3y=1|*-4\\
4x+y=5\\
-4x-12y=-4\\
4x+y=5\\
-11y=1\\
y=-1/11
y=-1/11
x+3*(-1/11)=1
y=-1/11
x-3/11=1
y=-1/11
x=1+3/11
y=-1/11
x= 20/11