rozwiąż algebraicznie układy równań : x+2y=-1 x-y= -4
3x+y= -3 2x-3y= -2 prosze,o pomoc...;/
a)
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b)
Pozdrawiam :)
x+2y=-1 /*(-1)
x-y=-4
-x-2y=1
-2y-y=1-4
-3y=-3 /: (-3)
y=1
................
x-1=-4
x=-4+1
x=-3
b]
3x+y=-3 /*3
2x-3y=-2
9x+3y=-9
9x+2x=-9-2
11x=-11 /:11
x=-1
...........
3x+y=-3
3*(-1)+y=-3
y=-3+3
y=0
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a)
_____________________________________________________________________
b)
Pozdrawiam :)
x+2y=-1 /*(-1)
x-y=-4
-x-2y=1
x-y=-4
-2y-y=1-4
-3y=-3 /: (-3)
y=1
................
x-y=-4
x-1=-4
x=-4+1
x=-3
x=-3
y=1
................
b]
3x+y=-3 /*3
2x-3y=-2
9x+3y=-9
2x-3y=-2
9x+2x=-9-2
11x=-11 /:11
x=-1
...........
3x+y=-3
3*(-1)+y=-3
y=-3+3
y=0
...........
x=-1
y=0
...........