解:(1)6x+3.6=12,
6x+3.6-3.6=12-3.6,
6x=8.4,
6x÷6=8.4÷6,
x=1.4;
(2)8x+25=57,
8x+25-25=57-25,
8x=32,
8x÷8=32÷8,
x=4;
(3)0.8+3.6x=1.52,
0.8-0.8+3.6x=1.52-0.8,
3.6x=0.72,
3.6x÷3.6=0.72÷3.6,
x=0.2;
(4)
x=18,
x÷
=18÷
,
x=18×
,
x=24;
(5)
x=
,
x÷
=
÷
,
x=
×
,
x=
;
(6)
x÷14=
,
x÷14×14=
×14,
x=7,
x÷
=7÷
,
x=7×
,
x=4.
分析:(1)根據(jù)等式性質(zhì),兩邊同減去3.6,再同除以6即可;
(2)根據(jù)等式性質(zhì),兩邊同減去25,再同除以8即可;
(3)根據(jù)等式性質(zhì),兩邊同減去0.8,再同除以3.6即可;
(4)根據(jù)等式性質(zhì),兩邊同除以
即可;
(5)根據(jù)等式性質(zhì),兩邊同除以
即可;
(6)根據(jù)等式性質(zhì),兩邊同乘上14,再同除以
即可.
點評:此題考查了學(xué)生根據(jù)等式的性質(zhì)解方程的能力.