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解下列方程:(1)32x?1=32(2)x÷(1-20%)=1.15.
1个回答
展开全部
(1)
x-1=
,
x-1+1=
+1,
x=
,
x÷
=
÷
,
x=1
;
(2)x÷(1-20%)=1.15,
x÷0.8=1.15,
x÷0.8×0.8=1.15×0.8,
x=0.92.
3 |
2 |
3 |
2 |
3 |
2 |
3 |
2 |
3 |
2 |
5 |
2 |
3 |
2 |
3 |
2 |
5 |
2 |
3 |
2 |
x=1
2 |
3 |
(2)x÷(1-20%)=1.15,
x÷0.8=1.15,
x÷0.8×0.8=1.15×0.8,
x=0.92.
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