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第18页

信息发布者：

B

A

C

B

A

解： 54x =162

54x÷54 =162÷54

x =3

解： 3x =0.9

3x÷3 =0.9÷3

x =0.3

解： 4.2x+3.9 =16.5

4.2x+3.9-3.9 =16.5-3.9

4.2x =12.6

4.2x÷4.2 =12.6÷4.2

x =3

解： 5x-16 =48

5x-16+16 =48+16

5x =64

5x÷5 =64÷5

x =12.8

解： 5x+13.5 =25

5x+13.5-13.5 =25-13.5

5x =11.5

5x÷5 =11.5÷5

x =2.3

解： 4.8x =14.4

4.8x÷4.8 =14.4÷4.8

x =3

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