解:(1)1
=
,
1.2+0.375x-1.2=0.875x-0.2-1.2,
0.375x=0.875x-1.4,
0.375x-0.375x=0.875x-1.4-0.375x,
0.5x-1.4=0,
0.5x-1.4+1.4=0+1.4,
0.5x=1.4,
0.5x÷0.5=1.4÷0.5,
x=2.8;
(2)
:
=
:
,
×
x=
×
,
x=
,
x×9=
×9,
x=
.
分析:(1)根據(jù)等式的性質(zhì),兩邊同減去1.2,得0.375x=0.875x-1.4,兩邊同減去0.375x,得0.5x-1.4=0,兩邊同加上1.4,再同除以0.5即可;
(2)先根據(jù)比例的性質(zhì)改寫成
×
x=
×
,即
x=
,再根據(jù)等式的性質(zhì),兩邊同乘9即可.
點評:此題考查了根據(jù)等式的性質(zhì)解方程,即等式兩邊同加、同減、同乘或同除以一個數(shù)(0除外),等式的左右兩邊仍相等;注意等號上下要對齊.