Răspunsuri

2014-11-15T19:54:01+02:00
X-garsoniere
y-ap.cu 2 camere
z-ap.cu 3 camere
x+y+z=56    stim ca sunt 20 ap.cu 2 camere deci avem
x+20+z=56⇒    x+y=56-20⇒
x+z=36       rel.(1)
x+2y+3z=128⇒ x+2·20+3z=128⇒     x+40+3z=128
x+3z=128-40
x+3z=88    rel.2
deci avem
{x+z=36              (-1)⇒  {-x-z=-36
{x+3z=88                    {x+3z=88⇒    (x-x)+(3z-z)=88-36
2z=52
z=52/2
z=26 ap.cu 3 camere
x=36-z=36-26
x=10 garsoniere
10+26+20=56 ap

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