Rozwiąż układ równań metodą podstawiania.
1/3x+2y+1=0
y+x-2=0
^
|
to ma być spięte klamrą
⅓x+2y+1=0
⅓x+2y=-1
x+y=2
x=2-y
⅓(2-y)+2y=-1
⅔-⅓y+2y=-1
1⅔y=-1⅔/:1⅔
y=-1
x=2-(-1)
x=2+1
x=3
licze na naj ;d
1/3x+2y+1=0|*3
x+6y+3=0
y=-x+2
x+6*(-x+2)+3=0
x-6x+12+3=0
x-6x=-15
-5x=-15
x=5
y=-5+2
y=-3
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⅓x+2y+1=0
y+x-2=0
⅓x+2y=-1
x+y=2
x=2-y
⅓(2-y)+2y=-1
⅔-⅓y+2y=-1
1⅔y=-1⅔/:1⅔
y=-1
x=2-y
x=2-(-1)
x=2+1
x=3
licze na naj ;d
1/3x+2y+1=0|*3
y+x-2=0
x+6y+3=0
y=-x+2
x+6*(-x+2)+3=0
y=-x+2
x-6x+12+3=0
y=-x+2
x-6x=-15
y=-x+2
-5x=-15
y=-x+2
x=5
y=-5+2
x=5
y=-3