Rozwiąż układy równań . Zadania w załączniku !!! Sorry za jakość tam w jednym przykładzie jest 0 tak na końcu
a)
{1/2 (x-3) + 1/3 (y+1) = 1 | *6
{1/2 (x+1) - 1/4 (y-1) = 0 | *4
{3x-9+2y+2=6
{2x+2-y+1=0
{3x+2y-7=6 |+7
{2x-y+3=0
{3x+2y=13
{2x-y=-3 |*2
{4x-2y=-6
-------------------
7x=7 |:7
x=1
3x+2y=13
3*1+2y=13
3+2y=13 |-3
2y=10 |:2
y=5
{x=1
{y=5
b)
{1/3(x+1)-1/2(y-1)=0 |*6
{3/4(x+2)- 1/2(y+1)=1 |*4
{2x+2-3y+3=0
{3x+6-2y-2=4
{2x-3y+5=0 |-5
{3x-2y+4=4 | -4
{2x-3y=-5 |*(-3)
{3x-2y=0 |*2
{-6x+9y=15
{6x-4y=0
----------------
5y=15 |:5
y=3
2x-3y=-5
2x-3*3=-5
2x-9=-5 | +9
2x=4 |:2
x=2
{x=2
{y=3
c)
x+1
{ ----- - y=-2 | *2
2
y+1
{ x- ---------- = 2 |*5
5
{ x+1-2y=-4 |-1
{5x-y-1=10 |+1
{x-2y=-5
{5x-y=11 |*(-2)
{-10x+2y=-22
-------------------------
-9x=-27 | :(-9)
x=3
x-2y=-5
3-2y=-5 |-3
-2y=-8 |:(-2)
y=4
{x=3
{y=4
d)
x+2
{-------- +2y=11 |*3
3
y-3
{3x+ ---------- = 4 |*2
{x+2+6y=33 |-2
{6x+y-3=8 |+3
{x+6y=31
{6x+y=11 |*(-6)
{-36x-6y=-66
-----------------------
-35x=-35 |:(-35)
x+6y=31
1+6y=31 |-1
6y=30 |:6
Liczę na NAJ, pozdrawiam wroniaak:)
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a)
{1/2 (x-3) + 1/3 (y+1) = 1 | *6
{1/2 (x+1) - 1/4 (y-1) = 0 | *4
{3x-9+2y+2=6
{2x+2-y+1=0
{3x+2y-7=6 |+7
{2x-y+3=0
{3x+2y=13
{2x-y=-3 |*2
{3x+2y=13
{4x-2y=-6
-------------------
7x=7 |:7
x=1
3x+2y=13
3*1+2y=13
3+2y=13 |-3
2y=10 |:2
y=5
{x=1
{y=5
b)
{1/3(x+1)-1/2(y-1)=0 |*6
{3/4(x+2)- 1/2(y+1)=1 |*4
{2x+2-3y+3=0
{3x+6-2y-2=4
{2x-3y+5=0 |-5
{3x-2y+4=4 | -4
{2x-3y=-5 |*(-3)
{3x-2y=0 |*2
{-6x+9y=15
{6x-4y=0
----------------
5y=15 |:5
y=3
2x-3y=-5
2x-3*3=-5
2x-9=-5 | +9
2x=4 |:2
x=2
{x=2
{y=3
c)
x+1
{ ----- - y=-2 | *2
2
y+1
{ x- ---------- = 2 |*5
5
{ x+1-2y=-4 |-1
{5x-y-1=10 |+1
{x-2y=-5
{5x-y=11 |*(-2)
{x-2y=-5
{-10x+2y=-22
-------------------------
-9x=-27 | :(-9)
x=3
x-2y=-5
3-2y=-5 |-3
-2y=-8 |:(-2)
y=4
{x=3
{y=4
d)
x+2
{-------- +2y=11 |*3
3
y-3
{3x+ ---------- = 4 |*2
2
{x+2+6y=33 |-2
{6x+y-3=8 |+3
{x+6y=31
{6x+y=11 |*(-6)
{x+6y=31
{-36x-6y=-66
-----------------------
-35x=-35 |:(-35)
x=1
x+6y=31
1+6y=31 |-1
6y=30 |:6
y=5
{x=1
{y=5
Liczę na NAJ, pozdrawiam wroniaak:)