rozwiąż równania a) 2kreska x =3 kreska x - 1
b) 4kreska x+ 1 = 5 kreska x
c) 3 kreska 5 = 2x-1 kreska 2-5x
d) 2x+1kreska 1-2x=2 kreska 3
e) 0,4x-1 kreska 3 = 2x-5 kreska 2
f) 4+ x potęgi 2 kreska x =2x-1 kreska 2
prosze o szybką odp pilne
równania
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a)
2 3
-- = -----
x x-1
2*(x-1) = 3*x
2x - 2= 3x
2x - 3x = 2
-x = 2/*(-1)
x -2
b)
4 5
---- = ----- =
x+1 x-1
4*(x - 1) = (x + 1)*5
4x - 4 = x + 5
4x - x = 5 + 4
3x = 9/ :3
x = 3
c)
3 2x - 1
-- = --------
5 2 - 5x
3*(2 - 5x) = 5*(2x - 1)
6 - 15x = 10x - 5
6 + 5 = 10x + 15x
11 = 15x/ :15
11
---- = x
15
d)
2x +1 2
-------- = ---
1 -2x 3
(2x+1)*3 = (1-2x)*2
6x + 3 = 2 - 4x
6x + 4x = 2 - 1
10x = -1/:10
x = -1
-----
10
e)
0,4x - 1 2x - 5
---------- = --------
3 2
(0,4x - 1)* 2 = (2x - 5)*3
0,8x - 2 = 6x - 15
-2 + 15 = 6x - 0,8x
13 = 5,2x/:5,2
x = 2,5
f) 4+x^2=2x-1/2
(4+x^2)2=x(2x-1)
8+2x^2=2x^2-x
x=-8
1) 2/x=3/x-1
3x=2(x-1)
3x=2x-2
x=-2
2)4/x+1=5/x
5x+5=4x
x=-5
3)3/5=2x-1/2-5x
5(2x-1)=3(2-5x)
10x-5=6-15x
5x=11
x=11/5
4)2x+1/1-2x=2/3
2(1-2x)=3(2x+1)
2-4x=6x+3
-10x=1
x=-1/10
5)0,4-1/3=2x-5/2
(0,4-1)2=3(2x-5)
0,8-2=6x-15
x=2,3
6)4+x kwadrat/x=2x-1/2
(4+x²)2=x(2x-1)
8+2x²=2x²-x
x=-8