分析:(1)先去分母,再移項(xiàng)、合并同類項(xiàng),系數(shù)化為1即可;
(2)先去括號(hào),再移項(xiàng)、合并同類項(xiàng),系數(shù)化為1即可;
(3)先去分母,再去括號(hào),移項(xiàng),合并同類項(xiàng),系數(shù)化為1即可.
解答:解:(1)去分母得,2x=3x+32,
移項(xiàng)得,2x-3x=32,
合并同類項(xiàng)得,-x=32,
系數(shù)化為1得,x=-32;
(2)去括號(hào)得,2x-4=12x-3+9,
移項(xiàng)得,2x-12x=-3+9+4,
合并同類項(xiàng)得,-10x=10,
系數(shù)化為1得,x=-1;
(3)去分母得,2(2x-1)=2x+1-6,
去括號(hào)得,4x-2=2x+1-6,
移項(xiàng)得,4x-2x=1-6+2,
合并同類項(xiàng)得,2x=-3,
系數(shù)化為1得,x=-
.
點(diǎn)評(píng):本題考查的是解一元一次方程,解一元一次方程時(shí)先觀察方程的形式和特點(diǎn),若有分母一般先去分母;若既有分母又有括號(hào),且括號(hào)外的項(xiàng)在乘括號(hào)內(nèi)各項(xiàng)后能消去分母,就先去括號(hào).