Răspunsuri

2014-11-01T12:43:39+02:00
A) x+2y+y-3z=x+3y-3z=17+4=21
b)3(x+2y)-2(y-3z)=3•17-2•4=43
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2014-11-01T12:45:53+02:00
A) x+2y+y-3z=17+4
x+3y-3z=21
b) (3x+6y)+(2y-6z)
x+2y=17 => 3x+6y=51
y-3z=4 => 2y-6z=8
51+8=59

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