题目内容
解方程.
| 4x+0.4x=70.4 | ||
| 3x+90%×4=9 |
|
(1)
x-50%x=6.5
x=6.5
x÷
=6.5÷
x=15.6;
(2)4x+0.4x=70.4
4.4x=70.4
4.4x÷4.4=70.4÷4.4
x=16;
(3)3x+90%×4=9
3x+3.6-3.6=9-3.6
3x÷3=5.4÷3
x=1.8;
(4)
x-120%=6.5
x-120%+120%=6.5+120%
x÷
=7.7÷
x=8.4.
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| 5 |
| 12 |
x=15.6;
(2)4x+0.4x=70.4
4.4x=70.4
4.4x÷4.4=70.4÷4.4
x=16;
(3)3x+90%×4=9
3x+3.6-3.6=9-3.6
3x÷3=5.4÷3
x=1.8;
(4)
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| 12 |
| 11 |
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| 11 |
| 12 |
| 11 |
| 12 |
| 11 |
| 12 |
x=8.4.
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