rozwiaz rownanie :
a . 9 x =3 ) *2 -1 = x *2
b . 2 + ( x -4 ) ( x +4 ) =(x -1 ) *2
c .4 *2 - ( 1 - 2 x ) *2+2 x = 11
d 0 =4 (10 -5 x ) -3 ( - 3 x -5 )
e . x - ( x -1 ) -4 ( x -2 ) ( x + 2 ) -x
f . ( x + 1 ) *3 =x ( x *2 +3 x )
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