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Jana K.
matematika

Lineárne rovnice

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x/3=9..........x=27
-(a/4)=1.........a=-4
y/3=-2.........y=-6
(x+1)/3=2.........x=-7
(-x+2)/3=4........x=-14
5.[(-x+2)/2]=4.......x=-6
x/5=4/5........x=4
x/5+1=4........x=15
(x+2)/2+2=2.......x=-2
(x+3)/2=-x+2.......
x=1/3

2 odpovede
4, 5, 6 mas NOK
Komentáre:
Jana K.
Ako? Nepochopila som.
(x+1)/3=2 / . 3
x + 1 = 6 / - 1
x = 2 ... nie -7

(-x+2)/3=4 / . 3
-x + 2 = 12 / - 2
-x = 10 / . (-1)
x = -10 ... nie x=-14

5.[(-x+2)/2]=4 / : 5
(-x+2)/2 = 4/5 / . 2
-x + 2 = 8/5 / - 2
-x = - 2/5 / . (-1)
x = 2/5 ... nie x=-6