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x - x = 2 - 6 - 1
0 = -5
3. 2 - 3x + 2(x +1) = 12x + 1
2 - 3x + 2x + 2 = 12x + 1
-x - 12 x = 1 - 2 - 2
-13x = -7
x = 7/13
2. 2 + x - x = 1/3
x - x = 1/3 - 2
0 = -1 2/3
1.2x - 7(x + 2) = 12 + x
2x - 7x - 14 = 12 + x
- 4x = -2 :-4
x = 1/2
a to 5 to nie jest takie łatwe. ;p trzeba pomyśleć tylko.