Zad.1Wpisz brakujace liczby.
a)
x-3y=5 |*(-4)
4x+5y=1
-4x+....y=...
4x+5y=1
...y=....
y=...
x-3y=5
x=5+3*...
x=...
x=...
y=...
b)
0,3x+1,5y=5 |*2
1,5x+y=-1 |*(-3)
...x+...y=...
...x+...y=...
...x=...
x=...
1,5x+y=-1
y=...
y=...
x=...
y=...
Zad.2Rozwiąż podany układ ruwnań,wpisujac brakujace liczby.
4x-5y=19
3x+2y=20
4x-5y=19 |*...
3x+2y=20 |*...
...x-10y=...
...x+10y=...
...x=...
x=...
4x-5y=19 |*...
3x+2y=20 |*...
12x -...y=...
-12x-...y=...
...y=...
y=...
Prosze o jak najszybsze rozwiazanie. Dam naj.
*-mnorzenie
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x-3y=5 |*(-4)
4x+5=1
-4x+12y=-20
4x+5y=1
-4x+4x+12y+5y=-20+1
17y=-19/:17
y=19/17
x-3y=5
x=5+3 *19/17
x=5+ 57/17
x=5+3 6/17
x=8 6/17
x=8 6/17
y=19/17
2.
4x-5y=19/*2
3x+2y=20/*5
8x-10y=38
15x+10y=100
23x=138/23
x=6
4x-5y=19
x=6
4*6-5y=19
24-5y=19
5y=24-19
5y=5/:5
y=1