Rozwiąż układy równań metodą podstawiania albo metodą przeciwnych współczynników.
1. { x-y-4
{ x+6+y+6=34
2. {x-3=3(y-3)
{x+4=2(y+4)
3. {y-1=5(x-1)
{z-1=2(y-1)
4. {x+y+2(y-1)
{y-1=5(x-1)
5. {x-3=4(y-3)
{x-3+y-3=55
6. {x=3y
{10x+y+x=88
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1.
x-y=4
x+6+y+6=34
x-y=4
x+y=22
x=26
26-y=4
y=22
x=26
y=22
2.
x-3=3(y-3)
x+4=2(y+4)
x-3=3y-9
x+4=2y+8
x-3y=-6/*(-1)
x-2y=4
-x+3y=6
x-2y=4
y=10
x-20=4
x=24
x=24
y=10
3.
y-1=5(x-1)
x-1=2(y-1)
y-1=5x-5
x-1=2y-2
y-5x=-4
x-2y=-1
-5x+y=-4/*2
x-2y=-1
-10x+2y=-8
x-2y=-1
-9x=-9/:(-9)
x=1
1-2y=-1
-2y=-2/:(-2)
y=1
x=1
y=1
4.
x+y=2(y-1)
y-1=5(x-1)
x+y=2y-2
y-1=5x-5
x-y=-2
y-5x=-4
x-y=-2
-5x+y=-4
-4x=6/:(-4)
x=1,5
1,5-y=-2
-y=-0,5/:(-1)
y-0,5
x=1,5
y=0,5
5.
x-3=4(y-3)
x-3+y-3=55
x-3=4y-12
x+y=61
x-4y=-9/*(-1)
x+y=61
-x+4y=9
x+y=61
5y=70/5
y=14
x+14=61
x=47
x=47
y=14