解方程
5.5x-3x=1.75 x+0.75-
|
(1)
+x=3 5
,9 10
+x-3 5
=3 5
-9 10
,3 5
x=
;3 10
(2)5.5x-3x=1.75
2.5x=1.75,
2.5x÷2.5=1.75÷2.5,
x=0.7;
(3)x+0.75-
=0.15,3 5
x+0.15=0.15,
x+0.15-0.15=0.15-0.15,
x=0.
解方程
5.5x-3x=1.75 x+0.75-
|
(1)
+x=3 5
,9 10
+x-3 5
=3 5
-9 10
,3 5
x=
;3 10
(2)5.5x-3x=1.75
2.5x=1.75,
2.5x÷2.5=1.75÷2.5,
x=0.7;
(3)x+0.75-
=0.15,3 5
x+0.15=0.15,
x+0.15-0.15=0.15-0.15,
x=0.