Sprawdź, ile rozwiązań ma równanie.
a) x - 2
------ = x- (x+1)
3
x +3
b) 2/3 (x+7)+1 = x - -------
3
c) 4 - 2(x-x2) + 4 x = 2(x - 1)(x +1)
d) 12 - [x - 4(6 - 2x)] = 9(4 - x)
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x-2=x-x-1
x-2=-1
x=1;
2/3 (x+7)+1 = x - x +3/*3
2x+14+1=9
2x=-6//:2
x=-3;
4 - 2(x-x2) + 4 x = 2(x - 1)(x +1)
4-2x+2x²=2x²+2x-2x-2
-2x=-6
x=3;