解方程. 2x-2/3=1/3 x-(1/4+1/5)=1/20.
问题描述:
解方程.
2x-
=2 3
1 3
x-(
+1 4
)=1 5
. 1 20
答
(1)2x-
=2 3
,1 3
2x-
+2 3
=2 3
+1 3
,2 3
2x=1,
2x÷2=1÷2,
x=0.5;
(2)x-(
+1 4
)=1 5
,1 20
x-
=9 20
,1 20
x-
+9 20
=9 20
+1 20
,9 20
x=
.1 2