题目内容
解方程.
x×(
+
)=
2x-90%=6.3.
x×(
| 5 |
| 9 |
| 5 |
| 12 |
| 7 |
| 20 |
2x-90%=6.3.
(1)x×(
+
)=
,
x×
=
,
x×
÷
=
÷
,
x=
;
(2)2x-90%=6.3,
2x-90%+90%=6.3+90%,
2x=7.2,
2x÷2=7.2÷2,
x=3.6.
| 5 |
| 9 |
| 5 |
| 12 |
| 7 |
| 20 |
x×
| 35 |
| 36 |
| 7 |
| 20 |
x×
| 35 |
| 36 |
| 35 |
| 36 |
| 7 |
| 20 |
| 35 |
| 36 |
x=
| 9 |
| 25 |
(2)2x-90%=6.3,
2x-90%+90%=6.3+90%,
2x=7.2,
2x÷2=7.2÷2,
x=3.6.
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