a)
7x-2=3x+26
4x=26+2
4x=28 /:4
x = 7
b)
3x+7=-3x+19
6x=19-7
6x=12 /:6
x = 2
c)
-x-1=-3x+17
-x+3x=17+1
2x=18 /:2
x = 9
d)
9x+5=4x-15
9x-4x=-15-5
5x=-20 /:5
x = -4
e)
-x+5=x+11
-x-x=11-5
-2x=6 /:(-2)
x = -3
Odpowiedź:
7x -2= 3x +26
7x-3x= 26+2
4x= 28 /:4
x= 7
_______________
3x+7 = - 3x +19
3x+3x= 19 -7
6x= 12 /:6
x=2
__________________
- x - 1 = - 3 x+17
-x +3x= 17 +1
2x= 18 /:2
x= 9
_________________
9x+5= 4x-15
9x -4x= - 15 -5
5x= - 20 /:5
x= - 4
_______________________
-x+5 = x +11
-x-x= 11 =5
-2x= 6 /:(-2)
x= -3
Szczegółowe wyjaśnienie:
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a)
7x-2=3x+26
4x=26+2
4x=28 /:4
x = 7
b)
3x+7=-3x+19
6x=19-7
6x=12 /:6
x = 2
c)
-x-1=-3x+17
-x+3x=17+1
2x=18 /:2
x = 9
d)
9x+5=4x-15
9x-4x=-15-5
5x=-20 /:5
x = -4
e)
-x+5=x+11
-x-x=11-5
-2x=6 /:(-2)
x = -3
Odpowiedź:
7x -2= 3x +26
7x-3x= 26+2
4x= 28 /:4
x= 7
_______________
3x+7 = - 3x +19
3x+3x= 19 -7
6x= 12 /:6
x=2
__________________
- x - 1 = - 3 x+17
-x +3x= 17 +1
2x= 18 /:2
x= 9
_________________
9x+5= 4x-15
9x -4x= - 15 -5
5x= - 20 /:5
x= - 4
_______________________
-x+5 = x +11
-x-x= 11 =5
-2x= 6 /:(-2)
x= -3
Szczegółowe wyjaśnienie: