解:(1)x÷318=53,
x÷318×318=53×318,
x=16854;
(2)x-3.02=4.18,
x-3.02+3.02=4.18+3.02,
x=7.2;
(3)x×63=5166,
x×63÷63=5166÷63,
x=82;
(4)4.084+x=9.34,
4.084+x-4.084=9.34-4.084,
x=5.256;
(5)16.3-x=3.75,
16.3-x+x=3.75+x,
16.3-3.75=3.75+x-3.75,
x=12.55..
分析:(1)依據(jù)等式性質(zhì),兩邊同時乘318求解,
(2)依據(jù)等式性質(zhì),兩邊同時加3.02求解,
(3)依據(jù)等式性質(zhì),兩邊同時除以63求解,
(4)依據(jù)等式性質(zhì),兩邊同時減去4.084求解,
(5)依據(jù)等式性質(zhì),兩邊同時加x,再同時減去3.75求解.
點評:本題主要考查了學(xué)生依據(jù)等式性質(zhì)解方程能力.