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10x=10
x =1
2 3x do kw - 4 x + 3 x = 11 +3x kw -4
-x= 7
x=-7
3 pomnozyc razy 12
3x-4x=6x-7
-7x= -7
x =1
12x-6-2x+6=10
10x=10
x=10/10
x=1
b i c są troszeczkę trudne