求未知数χ.χ- 5 8 χ=3(χ+2.1)÷3=6χ: 2
求未知数χ.χ-58χ=3(χ+2.1)÷3=6χ:27=14:25....
求未知数χ.χ- 5 8 χ=3(χ+2.1)÷3=6χ: 2 7 =14: 2 5 .
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残月297
推荐于2016-06-28
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(1)χ- χ=3, x=3, x ÷ =3 ÷ , x=8;
(2)(χ+2.1)÷3=6, (χ+2.1)÷3×3=6×3, x+2.1-2.1=18-2.1, x=15.9;
(3)χ: =14: , x= ×14, x ÷ =4 ÷ , x=10. |
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