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-3x - 3 -x = 9 /+3
-4 x = 12 /: -4
x= -3
b)
m/2 = 20/8 /* 2
m = 40/8
m = 5
c)
1-9x/5-3 = 5 - 3x/8 /*5
5 - 9x -15 = 25 - 15x/8 /*8
40-72x- 120 = 200 - 15x
-57 x = 280 /:-57
x= 4 52/57
d)
x + 2/3 = x/8 /*3
3x + 2 = 3x/8 / * 8
24x +16 = 3x
24x-3x= -16
21 x = -16
x= -16/21
-3x-3-x=9
-4x=12
x= -3
b)
m=
m= 5
c) Nie wiem jak to jest z tym wzorem co napisałaś.
d)