Układ równań :
x+2y+x+3y=27
2y=7
2x+5y=27
2y=7/:2
y=3,5
----
2x+17,5=27
2x=9,5
x=4,75
{x+2y+x+3y=27
{2y=7|:2
[2x+5y=27
[y=3.5
{2x+(3,5*5)=27
{y=3,5
[2x+17,5=27|-17,5
[y=3,5
{2x=9,5|:2
[x=4,75
klamry zmieniałem dla odróżnienia.
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x+2y+x+3y=27
2y=7
2x+5y=27
2y=7/:2
2x+5y=27
y=3,5
----
2x+17,5=27
2x=9,5
x=4,75
x=4,75
y=3,5
{x+2y+x+3y=27
{2y=7|:2
[2x+5y=27
[y=3.5
{2x+(3,5*5)=27
{y=3,5
[2x+17,5=27|-17,5
[y=3,5
{2x=9,5|:2
{y=3,5
[x=4,75
[y=3,5
klamry zmieniałem dla odróżnienia.