Prosze zrobić zadanie daje 35pkt
Rozwiąz układ równań.
a) {x=5
{2x+y=13
b){2x-3y=1
{x=-1
c){x+y=4
{x-y=3
d){2x+y=4
{3x-y=-2
e){3x-2y=1
{2x+y=0
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A){ X=5
{2*5+y=13
{x=5
{10+y+13
{x=5
{y=3
B) {2x-3y=1
{x=-1
{2*(-1)-3y=1
{x=-1
{2-3y=1
{y=-1
{x=-1
C) {x+y=4
{x-y=3
2x=7
x=3,5
D) {2x+y=4
{3x-y=-2
5x=2
x=2/5
E) {3x-2y=1
{2x+y=2 /*2
{3x-2y=1
{4x+2y=4
7x=5
x=5/7