Rozwiąż układy równań metodą podstawiania.
a)
{ x-y=6
y= -1
b) {3x-2y =6
x=4
c)
{3x+y=10
y=2x
d)
{ -x-3y=5
y= -2x
e)
{4x-y=6
y=x
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y=-1
x=y+6
x=5
y=-1
3x-2y=6
x=4
-2y=-3x+6
2y=3x-6
2y=12-6
2y=6
y=3
x=4
3x+y=10
y=2x
3x=-y+10
3x=-2x+10
5x=10
x=2
y=4
-x-3y=5
y=-2x
-x=3y+5
x=-3y-5
x=6x-5
-5x=-5
x=1
y=-2