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B)x-34=-35
C)1 2/3+y=2 3/4
D)x+75=57
A)x=1/7
B)x=-1
C)20+12y=33
12y=13
y=13/12 = 1 1/12
D)x=-18
3x-2x=1/7
x=1/7
B)x-34=-35
x=-35+34
x=-1
C)1 2/3+y=2 3/4
y=2 3/4-1 2/3
y=11/4-5/3
y=33/12-20/12
y=13/12
y=1 1/12
D)x+75=57
x=57-75
x=-18
1x= 1/7
B)x-34=-35 |+34
x= -1
C)1 2/3+y=2 3/4 |-1 2/3
1i 2/3 = 1i 8/12 2i 3/4= 2 i 9/12
y= 1i 1/12
D)x+75=57 |-75
x= -18 :)
To chyba wszystko :) powinno być dobrze;)