zadanie 1 .
Rozwiąż układy równań:
a) {3x-2y=5
{-2x+6y=9
b){3-3x=3y+2
{y+5=4x-3
c){-7=5x-3y
{3y-5x=0
d){6x=10-4y
{2-2/5y-3/5x=0
e){-2(5x-2y)+4(2x+y)=1
{3(2x-y)-(y+7x)=5,5
f){2x-y/4+3x+5/2=3
{x-7/5-2y+x/10=1
g){(x+3) do kwadratu-(y-1) do kwadratu=(x-y)(x+y)
{3x-7y=0
h){(x-5) do kwadratu-(x+2) do kwadratu=7y
{(y+4) do kwadratu-(y-2)(y+2)=8x
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a)
{3x-2y=5 \\*3
{-2x+6y=9
{9x-6y=15
{-2x+6y=9
9x-6y-2x+6y=15+9
7x=24 \\ :7
x=3 3/24
{3*3 1/8 - 2y=5
{x=3 1/8
{9 1/8 -2y =5
{x=3 1/8
{-2y=5-9,125
{x=3 1/8
-2y=-4,125 \\:(-2)
{x=3,125
y=2,0625
x=3,125
wiesz co nie mam pojecia jak to zrobic... bo jak tego nie licze to wychodzi zle ....