Zad.9/100
a){2x-2y=7
{4x+3y=21
b){0,4x+0,3y=1,4
{0,1x+3y=2,3
PLIS
;D
a {2x-2y=7/(-2)
{-4x+4y=-14
7y=7/:7
y=1
{2x-2y=7
{2x-2*1=7
2x=7+2
2x=9/:2
x=4,5
b {0,4x+0,3y=1,4
{0,1x+3y=2,3/(-4)
{0,4x+0,3y=1,4
{-0,4x-12y=-9,2
4y=7,8/0,9
y=1,95
sory pomyłka
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a {2x-2y=7/(-2)
{4x+3y=21
{-4x+4y=-14
{4x+3y=21
7y=7/:7
y=1
{2x-2y=7
{2x-2*1=7
2x=7+2
2x=9/:2
x=4,5
b {0,4x+0,3y=1,4
{0,1x+3y=2,3/(-4)
{0,4x+0,3y=1,4
{-0,4x-12y=-9,2
4y=7,8/0,9
y=1,95
sory pomyłka