pomuzcie daje naj odrazuu bez zastanawiania
POwinny być takie odpowiedzi :
a)x=1
b)x=-2,5
c)x=2.5
d)x=-¼
e)x=2,4
f)x=-2i2/3
g)x=1
h)x=1/6
zadanie
a)x/3+1=5/6+x/2 b)2x-3/4=1/2+x c)x+2/9+x-1/3=1 d)2x+3/5=2-x/3+x e)3x-5/2-5x-1/10=0 f)x/2=2/5(4-x)-4 g)2x-1/5-x-2/2=0,7x h)2x-3x+5/4=-1/4x-1 prosze o pomoc" Life is not a problem to be solved but a reality to be experienced! "
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a)
x 5 x
-- + 1 = ----- + ------ /*6
3 6 2
2x + 6 = 5 +3x
2x-3x = 5 - 6
-x = -1 /:(-1)
x = 1
b)
2x - 3 1
--------- - ---- = x /*4
4 2
2x-3 -2 = 4x
2x - 4x = 5
-2x = 5 /:(-2)
x = -2,5
c)
x+2 x - 3
------ + ---------- = 1 /*9
9 3
x+2 +3x-9 = 9
4x = 9+9-2
4x = 18 /:4
x= 2,5
d)
2x+3 2-x
------- = -------- + x /*15
5 3
6x + 9 = 10 -5x + 15x
6x + 5x -15x = 10 - 9
-4x = 1 /:(-4)
x= - 1/4
e)
3x - 5 5x - 1
--------- - ------------ = 0 /*10
2 10
15x - 25 - 5x +1 = 0
10x = 24 /:10
x = 2,4
f)
x 2
-- = ---- (4-x) - 4 /*10
2 5
5x = 16 -4x -40
5x+4x = -24
9x = -24 /:9
2
x = - 2 ---
3
g)
2x - 1 x- 2
-------- - ------------ = 0,7x /*10
5 2
4x - 2 - 5x +10 = 7x
4x - 5x - 7x = 2 - 10
-8x = -8 /:(-8)
x = 1
h)
3x + 5 1
2x - ---------- = - --- x - 1 /*4
4 4
8x - 3x - 5 = -x -4
8x - 3x +x = -4+5
6x = 1 /:6
x = 1/6