优优班--学霸训练营 > 知识点挑题
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            • 1. 解方程
              6x+1
              1
              2
              =15;        5×3.82-4x=9.5.
            • 2. 解方程.
              (1)
              17
              24
              x=
              5
              12
                          
              (2)x:
              8
              21
              =7           
              (3)80%x-
              3
              5
              =
              7
              5
                          
              (4)25%x-15%x=
              3
              5
            • 3. 解方程.
              (1)
              17
              24
              x=
              5
              12
                          
              (2)x:
              8
              21
              =42:36         
              (3)80%x-
              3
              5
              =
              7
              5
                          
              (4)35%x+40%x=120.
            • 4. 解方程(比例)
              1.2:x=0.25:
              5
              6
                       
              (x-
              1
              2
              )÷3=
              1
              4
                      
              x-0.3x-4.6=0.3.
            • 5. 求未知数X.
              1-20%x=
              1
              2
                               
              6.25
              2.5
              =
              10
              x
                               
              x:
              4
              5
              =
              7
              6
              2
              3
            • 6. 求未知数x.
              1
              3
              1
              4
              =8:x
              3
              5
              x-
              1
              2
              x=7
              x+
              1
              4
              x=20
              4
              9
              1
              6
              =x:15
              x
              8
              -14.5=5.5
              2
              3
              x+
              1
              2
              x=42
            • 7. 求未知数x.
              4.2+0.5x=5.6;     x-
              1
              5
              x=
              3
              10
              ;       
              0.25
              1.25
              =
              1.6
              χ
            • 8. 解方程.
              26.3+x=93                       
              0.7x=1.54.
            • 9. 求未知数X.
              1
              4
              1
              20
              =x:5                       
              2.2x-1.7x-4=15
              x+
              1
              4
              -
              5
              6
              x=
              5
              6
                                   
              3(x+3)=4(x+1)
            • 10. 解方程:
              (1)3x+1.2=43.2                          (2)
              3
              8
              :x=
              1
              8
              :4.
            0/40

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