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-2x = -5-97
-2x = -102 /:(-2)
x = 51
b) 43= 7+9x
-9x = 7-43
-9x = -36 /:(-9)
x = 4
c) 17 = 11 -12x
12x = 11-17
12x = -6 /:12
x = -1/2
d) 3(2/3) = (1/2x) - (1/3)
-1/2x = -1/3 - 3(2/3)
-1/2x = -4 /*(-2)
x = 8
Pozdrawiam.! ;**
97+5=2x
102=2x /:2
x=51
2.43=7+9x
9x=43-7
9x=36 /:9
x=4
3. 17=11-12x
17-11=-12x
6=-12x /:(-12)
x=- 6/12
x=-½
4. 3(2/3)=(1/2)x - 1/3
6/3= (1/2)x -1/3
2+(1/3)=(1/2)x
2 1/3= (1/2)x /: (1/2)
2 1/3 * 2/1=x
7/3 *2/1 =x
x=14/3
x=4 2/3
mam nadzieję że pomogłam:)
* [gwiazdka} oznacza mnożenie
a) -2x= -97 - 5
-2x= - 102| : - 2
x= 51
b)
- 9x= 7 - 43
- 9x= - 36 | :-9
x =4
c)
12x=11 - 17
12x= -6 | :12
x= - 6/12
x= -1/2
jesli tu jest w poleceniu 3 razy 2/3 to będzie tak:
d. 6/3=1/2x - 1/3
-1/2x = -1/3 - 6/3
-1/2x = -7/3 | : -1/2
x= -7/3 * (-2)
x= 14/3
x= 4 2/3
a jesli jest 3 i 2/3 to bedzie tak
11/3 = 1/2x - 1/3
- 1/2x = - 1/3 - 11/3
-1/2x = -12/3 | : -1/2
x= - 12/3 * (- 2/1)
x= 24/3
x=7 3/3