(1)解方程: 2 x x - 2 = 3 x - 2 + 1 ;
(2)解不等式: 4 ( x - 1 ) - 1 2 < x
(2)先化简,再求值: – ,其中x = –3
(1)计算:3(–π)0– + (–1)2011
计算:(1)2×(-5)+23-3÷.