题目内容
巧解密码:
(1)(3X+2)+2[(X-1)-(2X+1)]=6
(2)若
X:7.5=0.16:1
,求75X+8的值.
(1)(3X+2)+2[(X-1)-(2X+1)]=6
(2)若
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| 2 |
| 7 |
| 8 |
(1)(3X+2)+2[(X-1)-(2X+1)]=6,
3x+2+2(-x-2)=6,
3x+2-2x-4=6,
x-2=6,
x-2+2=6+2,
x=8;
(2)
X:7.5=0.16:1
,
x×1
=7.5×0.16,
x=1.2,
x÷
=1.2÷
,
x=1
,
75×1
+8,
=96+8,
=104.
3x+2+2(-x-2)=6,
3x+2-2x-4=6,
x-2=6,
x-2+2=6+2,
x=8;
(2)
| 1 |
| 2 |
| 7 |
| 8 |
| 1 |
| 2 |
| 7 |
| 8 |
| 15 |
| 16 |
| 15 |
| 16 |
| 15 |
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x=1
| 7 |
| 25 |
75×1
| 7 |
| 25 |
=96+8,
=104.
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