Odpowiedź:
4x -7= 2x +9
4x - 2x = 9+7
2x = 16/:2
x= 8
3-8x=18-3x
-8x+3x = 18-3
-5x=15/:5x
x=-3
2-x=12+7x
-x-8x = 12-2
-9x = 10
x=-9/10
3x+5x-6=6x+2
3x+5x-6x=2+6
2x=8/:2
x=4
5-9x+6=2x+14-x
-9x-2x+x=14-6+5
-10x=14
x=-14/10
a) 4x-7 =2x+9
4x-2x= 9+7
2x= 16 /:2
x=8
spr... 4*8-7= 2*8+9
32-7= 16+9
25= 25
L=P
b) 3-8x = 18- 3x
-8x +3x= 18 -3
-5x= 15 /:5
x= - 3
spr... 3 - 8*(-3) = 18 - 3*(-3)
3 + 24 = 18 +9
27= 27
c) 2-x = 12 + 7x
-x- 7x= 12 -2
-8 x= 10 /:8
x= - 10/8 = - 1 i 2/8= - 1 i 1/4
spr... 2 - (- 10/8) = 12 + 7 *(-10/8)
2 + 10/8 = 12 - 70/8
2 + 1 i 1/4= 12- 8 i 6/8 = 12- 8 i 3/4
3 i 1/4 = 11 i 4/4- 8 i 3/4
3 i 1/4= 3 i 1/4
d) 3x+5x -6= 6x+2
8x-6x= 2+6
2x= 8 /:2
spr... 3*4 +5*4-6= 6*4 +2
12 + 20 - 6= 24 +2
26=26
e) 5-9x+6= 2x+14 -x
-9x -2x+x= 14 -5-6
-10x= 3 /: 10
x= - 3/10
spr... 5 - 9*(-3/10) +6= 2*(-3/10) + 14 - (-3/10) ( skracamy 2 i 10 przez 2)
5 + 27/10 +6= -3/5 +14 + 3/10
5 + 2 i 7/10 +6= - 6/10 + 3/10 +14
13 i 7/10= 13 i 10/10- 3/10
13 i 7/10= 13 i 7/10
Szczegółowe wyjaśnienie:
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2025 KUDO.TIPS - All rights reserved.
Odpowiedź:
4x -7= 2x +9
4x - 2x = 9+7
2x = 16/:2
x= 8
3-8x=18-3x
-8x+3x = 18-3
-5x=15/:5x
x=-3
2-x=12+7x
-x-8x = 12-2
-9x = 10
x=-9/10
3x+5x-6=6x+2
3x+5x-6x=2+6
2x=8/:2
x=4
5-9x+6=2x+14-x
-9x-2x+x=14-6+5
-10x=14
x=-14/10
Verified answer
Odpowiedź:
a) 4x-7 =2x+9
4x-2x= 9+7
2x= 16 /:2
x=8
spr... 4*8-7= 2*8+9
32-7= 16+9
25= 25
L=P
b) 3-8x = 18- 3x
-8x +3x= 18 -3
-5x= 15 /:5
x= - 3
spr... 3 - 8*(-3) = 18 - 3*(-3)
3 + 24 = 18 +9
27= 27
L=P
c) 2-x = 12 + 7x
-x- 7x= 12 -2
-8 x= 10 /:8
x= - 10/8 = - 1 i 2/8= - 1 i 1/4
spr... 2 - (- 10/8) = 12 + 7 *(-10/8)
2 + 10/8 = 12 - 70/8
2 + 1 i 1/4= 12- 8 i 6/8 = 12- 8 i 3/4
3 i 1/4 = 11 i 4/4- 8 i 3/4
3 i 1/4= 3 i 1/4
L=P
d) 3x+5x -6= 6x+2
8x-6x= 2+6
2x= 8 /:2
x=4
spr... 3*4 +5*4-6= 6*4 +2
12 + 20 - 6= 24 +2
26=26
L=P
e) 5-9x+6= 2x+14 -x
-9x -2x+x= 14 -5-6
-10x= 3 /: 10
x= - 3/10
spr... 5 - 9*(-3/10) +6= 2*(-3/10) + 14 - (-3/10) ( skracamy 2 i 10 przez 2)
5 + 27/10 +6= -3/5 +14 + 3/10
5 + 2 i 7/10 +6= - 6/10 + 3/10 +14
13 i 7/10= 13 i 10/10- 3/10
13 i 7/10= 13 i 7/10
L=P
Szczegółowe wyjaśnienie: