解方程.x+0.75-35=
解方程.x+0.75-35=0.152x+58=4.62545-2X=142.7X-1.6=38.9....
解方程.x+0.75-35=0.152x+58=4.62545-2X=142.7X-1.6=38.9.
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(1)x+0.75-
=0.15,
x+0.15=0.15,
x+0.15-0.15=0.15-0.15,
x=0,
(2)2x+
=4.625,
2x+
-
=4.625-
,
2x=4,
x=2,
(3)
-2X=
,
-2x+2x-
=
+2x-
,
=2x,
2x=
,
x=
,
(4)2.7x-1.6=38.9,
2.7x-1.6+1.6=38.9+1.6,
2.7x=40.5,
2.7x÷2.7=40.5÷2.7,
x=15.
3 |
5 |
x+0.15=0.15,
x+0.15-0.15=0.15-0.15,
x=0,
(2)2x+
5 |
8 |
2x+
5 |
8 |
5 |
8 |
5 |
8 |
2x=4,
x=2,
(3)
4 |
5 |
1 |
4 |
4 |
5 |
1 |
4 |
1 |
4 |
1 |
4 |
11 |
20 |
2x=
11 |
20 |
x=
11 |
40 |
(4)2.7x-1.6=38.9,
2.7x-1.6+1.6=38.9+1.6,
2.7x=40.5,
2.7x÷2.7=40.5÷2.7,
x=15.
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