PROSZE O ROZWIAZANIE ZADANIA BARDZO DOBRZE
Rozwiaz uklady rownan metoda podstawiania:
a)
b)
c)
a) -x+5y=6|*(-1)
x-3y=-4
x-5y=-6
x=-6+5y
x=-4+3y
5y-6=3y-4
2y=2
y=1
x-5=-6
x=-1
b) 3x+y=3
2x-3y=2
y=3-3x
-3y=2-2x|/(-3)
y=(2x-2)/3
3-3x= (2x-2)/3
9-9x=2x-2
11x=11
x=1
y=0
c) -3x+2y=-7
5x+2y=1
2y=3x-7
2y=1-5x
1-5x=3x-7
8x=8
2y=1-5
y=-2
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a) -x+5y=6|*(-1)
x-3y=-4
x-5y=-6
x-3y=-4
x=-6+5y
x=-4+3y
5y-6=3y-4
2y=2
y=1
x-5=-6
y=1
x=-1
b) 3x+y=3
2x-3y=2
y=3-3x
-3y=2-2x|/(-3)
y=3-3x
y=(2x-2)/3
3-3x= (2x-2)/3
9-9x=2x-2
11x=11
x=1
y=0
c) -3x+2y=-7
5x+2y=1
2y=3x-7
2y=1-5x
1-5x=3x-7
8x=8
x=1
2y=1-5
x=1
y=-2