Odpowiedź :
a).
2x - 3y = 5
-x + 5y = 6
2x - 3y = 5
x = 5y - 6
2(5y - 6) - 3y = 5
10y - 12 - 3y = 5
7y = 17
y = 17/7
b).
3x - 3y + 3 = 0
x = 2 - 0,5y
3(2 - 0,5y) - 3y +3 = 0
6 - 1,5y - 3y +3 = 0
-4,5y = -9
y = 2
x = 2 - 0,5 * 2
x = 1
2x - 3y = 5
-x + 5y = 6
2x - 3y = 5
x = 5y - 6
2(5y - 6) - 3y = 5
10y - 12 - 3y = 5
7y = 17
y = 17/7
b).
3x - 3y + 3 = 0
x = 2 - 0,5y
3(2 - 0,5y) - 3y +3 = 0
6 - 1,5y - 3y +3 = 0
-4,5y = -9
y = 2
x = 2 - 0,5 * 2
x = 1
A.2x-3y=-5
-x+5y=6
2x-3y=-5
-x=6-5y/×-1
2x-3y=-5
x=-6+5y
2(-6+5y)-3y=-5
x=-6+5y
-12+10y-3y=-5
x=-6+5y
7y=7/7
x=-6+5y
y=1
x=-1
Spr.2x-3y=-5
2×(-1)-3×1=-5
-5=-5
L=P
-x+5y=6
-1×-1+5×1=6
6=6
L=P
B.3x-3y+3=0
x+0,5y-2=0
3x=3y-3/3
x+0,5y-2=0
x=y-1
x+0,5y-2=0
x=y-1
y-1+0,5y-2=0
x=y-1
1,5y=3-1,5
x=y-1
y=2
x=1
y=2
Spr.3x-3y+3=0
3×1-3×2+3=0
0=0
L=P
x+0,5y-2=0
1+0,5×2-2=0
0=0
L=P
-x+5y=6
2x-3y=-5
-x=6-5y/×-1
2x-3y=-5
x=-6+5y
2(-6+5y)-3y=-5
x=-6+5y
-12+10y-3y=-5
x=-6+5y
7y=7/7
x=-6+5y
y=1
x=-1
Spr.2x-3y=-5
2×(-1)-3×1=-5
-5=-5
L=P
-x+5y=6
-1×-1+5×1=6
6=6
L=P
B.3x-3y+3=0
x+0,5y-2=0
3x=3y-3/3
x+0,5y-2=0
x=y-1
x+0,5y-2=0
x=y-1
y-1+0,5y-2=0
x=y-1
1,5y=3-1,5
x=y-1
y=2
x=1
y=2
Spr.3x-3y+3=0
3×1-3×2+3=0
0=0
L=P
x+0,5y-2=0
1+0,5×2-2=0
0=0
L=P
2x-3y=-5
-x+5y=6/(x-1)
x-5y=-6
x=5y-6
2(5y-6)-3y=-5
10y-12-3y=-5
7y=7/:7
y=1
-x+5razy1=6
-x=1/razy -1
x=-1
x=-1
y=1
3x-3y+3=0
x+0,5y-2=0
3x=3y-3
x=y-1
y-1+0,5y-2=0
1,5y=3/:1,5
y=2
3x-3razy2+3=0
3x=3/:3
x=1
x=1
y=2
-x+5y=6/(x-1)
x-5y=-6
x=5y-6
2(5y-6)-3y=-5
10y-12-3y=-5
7y=7/:7
y=1
-x+5razy1=6
-x=1/razy -1
x=-1
x=-1
y=1
3x-3y+3=0
x+0,5y-2=0
3x=3y-3
x=y-1
y-1+0,5y-2=0
1,5y=3/:1,5
y=2
3x-3razy2+3=0
3x=3/:3
x=1
x=1
y=2