Odpowiedź :
Odpowiedź:
Poziom A
a) x- ( 2x-1 )-2x= 2 ( 3x -4)
x-2x +1 -2x= 6x -8
x-2x -2x -6x= -8 -1
-9x= -9 /:9
x=1
spr... 1-2*1 +1 -2*1 = 6*1-8
2- 4= 6-8
-2= - 2
L=P
***************************************
e) 2x + ( -3x +4 )= - 4 ( 3x-1)
2x -3x +4 = - 12x +4
2x-3x +12x= 4 -4
11x= 0
x=0
spr.. 2*0 -3*0 +4 = 12*0 +4
4=4
L=P
*************************************************
b) 3 ( x-2) - ( x-3) = -( 5x -4)
3x -6 -x +3 = - 5x+4
3x- x +5x= 4 +6 - 3
7x= 7 /:7
x=1
spr... 3*1 -6 -1 +3 = - 5*1 +4
3 -6-1 +3= -5 +4
-1= - 1
L=P
*****************************************
f) ( 5-x) - ( x+1) - 9 = - ( 2x+5)
5 - x -x -1 - 9 = -2x -5
-2x+2x= -5 +9 +1 -5
0= 0
x=0
spr... 5-0 -0 -1 -9 = -2*0- 5
-5= -5
L=P
***********************************************
c) -( 5x-3 )= 2 ( 4-x)
-5x +3 = 8 -2x
-5x +2x = 8 -3
-3x = 5 /:(-3)
x= - 5/3= - 1 i 2/3
spr... -5* (-5/3) +3 = 8 - 2*(-5/3)
25/3 + 3= 8+10/3
8 i 1/3 +3= 8 + 3 i 1/3
11 i 1/3= 11 i 1/3
L=P
****************************************************
g) -( 5 x +4 )+ ( x-1) - ( 1-x)= 0
-5x -4 +x -1 -1 +x= 0
-5x +2x= 4+1+1
-3x = 6 /:(-3)
x= - 2
spr... -5*(-2) -4 -2 - 1 - 1-2=0
10 -10= 0
0=0
L=P
*******************************************
d) - 2 ( 5x -7) -3x = 2 ( x-8)
-10x +14-3x= 2x -16
-10x -3x -2x= - 16 -14
-15x= -30 /:15
x= 2
spr... -10*2 +14 -3*2= 2*2 -16
-20 -6 +14= 4-16
-12= - 12
L=P
**************************************************
h) 4x-8 - ( x+3 ) + 2x = - ( 2x-3)
4x-8 -x -3 +2x= -2x +3
4x-x +2x +2x= 3 +3 +8
7x= 14 /:7
x=2
spr... 4*2 -8 -2-3 +2*2 = - 2*2 +3
8-8-5 +4 = - 4 +3
-1 = -1
L=P
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