Odpowiedź:
a)
3x+2(3x-2)=14
3x+6x-4=14
9x=18
x=2
b)
x/5-x/2=3
2x/10-5x/10=3
-3x/10=3
-3x=30
x= -3
c)
(x-1/)x = x/(x-2)
(x-1)/x-(x/(x-2)) = 0
(x-1)/x+(-1*x)/(x-2) = 0
((x-1)*(x-2))/(x*(x-2))+(-1*x^2)/(x*(x-2)) = 0
(x-1)*(x-2)-1*x^2 = 0
2-3*x = 0
(2-3*x)/(x*(x-2)) = 0
-3*x = -2
x = -2/(-3)
x = 2/3
3x + 2(3x - 2) = 14
3x + 6x - 4 = 14 | + 4
9x = 18 | : 2
x = 2
x:5 - x:2 = 3
x - x = 3
x - x = 3 | *10
2x - 5x = 30
-3x = 30 | : -3
x = -10
x - 1/x = x/x - 2 | * x
- 1 = x - 2x
+ x = 1
w tym C nie wiem, coś takiego mi wychodzi
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Odpowiedź:
a)
3x+2(3x-2)=14
3x+6x-4=14
9x=18
x=2
b)
x/5-x/2=3
2x/10-5x/10=3
-3x/10=3
-3x=30
x= -3
c)
(x-1/)x = x/(x-2)
(x-1)/x-(x/(x-2)) = 0
(x-1)/x+(-1*x)/(x-2) = 0
((x-1)*(x-2))/(x*(x-2))+(-1*x^2)/(x*(x-2)) = 0
(x-1)*(x-2)-1*x^2 = 0
2-3*x = 0
(2-3*x)/(x*(x-2)) = 0
(2-3*x)/(x*(x-2)) = 0
2-3*x = 0
2-3*x = 0
-3*x = -2
x = -2/(-3)
x = 2/3
x = 2/3
Odpowiedź:
a)
3x + 2(3x - 2) = 14
3x + 6x - 4 = 14 | + 4
9x = 18 | : 2
x = 2
b)
x:5 - x:2 = 3
x - x = 3
x - x = 3 | *10
2x - 5x = 30
-3x = 30 | : -3
x = -10
c)
x - 1/x = x/x - 2 | * x
- 1 = x - 2x
+ x = 1
w tym C nie wiem, coś takiego mi wychodzi