Odpowiedź:
a) 3+ 2 ( x-4) =1
3 + 2x -8 = 1
2x= 1 +8 -3
2x= 6 /:2
x=3
spr... 3 + 2*3 -8=1
3+6-8=1
9-8= 1
1=1
L=P
b) 4 - 2 ( y+1)= - 2
4 -2y -2= - 2
-2y= - 2 +2 -4
-2y= -4 /:(-2)
y= 2
spr.. 4- 2*2 -2= - 2
4-4 -2= - 2
-2= - 2
c) 12 + 3( 2-x)= 0
12 + 6 -3x= 0
-3x= -12 - 6
-3x= - 18 /:(-3)
x=6
spr.. 12 +6 - 3*6 =0
18-18=0
0=0
d) 5 - 2 ( 2-z) =3
5- 4 +2z =3
2z= 3 -5+4
2z= 2 /:2
z=1
spr.. 5- 4 +2*1 =3
1+2=3
3=3
e) 4 ( 2x-1 ) + 2 ( 5-3x )= 0
8x -4 +10 - 6x= 0
8x-6x = 4-10
2x= -6 /:2
x= - 3
spr.. 8*(-3) -4 +10 -6*(-3)= 0
-24 -4 +10 +18= 0
-28 +28=0
f) 7 ( 3y+1) - 6 ( 2y+3)= - 2
21 y +7 - 12y -18= -2
9y= -2 +18 -7
9y= 9 /:9
y=1
spr... 21*1 +7 -12*1-18= -2
21+7 -12 - 18= - 2
28-30= - 2
g) - 5 ( 2+3z) + 4 ( 4z -3)= 1
-10 -15z + 16z -12 =1
z= 1 +12 +10
z= 23
spr... -10 - 15 * 23 + 16*23 -12 =1
- 10 - 345 + 368 -12=1
13-12= 1
h) - 2 ( x-3) - 3 ( 3x+5) =2
-2x +6 -9x -15 =2
-11x= 2 +15 -6
-11x= 11 /:(-11)
x= - 1
spr... -2*(-1) +6 -9*(-1) -15= 2
2+6 +9-15=2
17-15= 2
2=2
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Odpowiedź:
a) 3+ 2 ( x-4) =1
3 + 2x -8 = 1
2x= 1 +8 -3
2x= 6 /:2
x=3
spr... 3 + 2*3 -8=1
3+6-8=1
9-8= 1
1=1
L=P
b) 4 - 2 ( y+1)= - 2
4 -2y -2= - 2
-2y= - 2 +2 -4
-2y= -4 /:(-2)
y= 2
spr.. 4- 2*2 -2= - 2
4-4 -2= - 2
-2= - 2
L=P
c) 12 + 3( 2-x)= 0
12 + 6 -3x= 0
-3x= -12 - 6
-3x= - 18 /:(-3)
x=6
spr.. 12 +6 - 3*6 =0
18-18=0
0=0
L=P
d) 5 - 2 ( 2-z) =3
5- 4 +2z =3
2z= 3 -5+4
2z= 2 /:2
z=1
spr.. 5- 4 +2*1 =3
1+2=3
3=3
L=P
e) 4 ( 2x-1 ) + 2 ( 5-3x )= 0
8x -4 +10 - 6x= 0
8x-6x = 4-10
2x= -6 /:2
x= - 3
spr.. 8*(-3) -4 +10 -6*(-3)= 0
-24 -4 +10 +18= 0
-28 +28=0
0=0
L=P
f) 7 ( 3y+1) - 6 ( 2y+3)= - 2
21 y +7 - 12y -18= -2
9y= -2 +18 -7
9y= 9 /:9
y=1
spr... 21*1 +7 -12*1-18= -2
21+7 -12 - 18= - 2
28-30= - 2
-2= - 2
L=P
g) - 5 ( 2+3z) + 4 ( 4z -3)= 1
-10 -15z + 16z -12 =1
z= 1 +12 +10
z= 23
spr... -10 - 15 * 23 + 16*23 -12 =1
- 10 - 345 + 368 -12=1
13-12= 1
1=1
L=P
h) - 2 ( x-3) - 3 ( 3x+5) =2
-2x +6 -9x -15 =2
-11x= 2 +15 -6
-11x= 11 /:(-11)
x= - 1
spr... -2*(-1) +6 -9*(-1) -15= 2
2+6 +9-15=2
17-15= 2
2=2
L=P
Szczegółowe wyjaśnienie: