题目内容
解方程.
(1)4x+18=50 (2)
:
=x:
(3)
=
(4)
=0.5.
(1)4x+18=50 (2)
| 1 |
| 4 |
| 1 |
| 8 |
| 1 |
| 10 |
| 17 |
| 3 |
| 51 |
| X |
| 3.2 |
| X |
(1)4x+18=50,
4x+18-18=50-18,
4x÷4=32÷4,
x=8;
(2)
:
=x:
x=
×
,
x8=
×8,
x=
;
(3)
=
,
17x=3×51,
17x÷17=153÷17,
x=9;
(4)
=0.5,
×x=0.5×x,
0.5x÷0.5=3.2÷0.5,
x=6.4.
4x+18-18=50-18,
4x÷4=32÷4,
x=8;
(2)
| 1 |
| 4 |
| 1 |
| 8 |
| 1 |
| 10 |
| 1 |
| 8 |
| 1 |
| 4 |
| 1 |
| 10 |
| 1 |
| 8 |
| 1 |
| 40 |
x=
| 1 |
| 5 |
(3)
| 17 |
| 3 |
| 51 |
| X |
17x=3×51,
17x÷17=153÷17,
x=9;
(4)
| 3.2 |
| X |
| 3.2 |
| X |
0.5x÷0.5=3.2÷0.5,
x=6.4.
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