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解: x+409-409 =655-409
x =246
解: x-4.7+4.7 =0.76+4.7
x =5.46
解: x÷5×5 =24×5
x =120
解: 32+6x-32 =50-32
6x =18
6x÷6 =18÷6
x =3
解: 8.2x-7.4+7.4=9+7.4
8.2x =16.4
8.2x÷8.2 =16.4÷8.2
x =2
解: 0.64x÷4×4 =1.6×4
0.64x =6.4
0.64x÷0.64 =6.4÷0.64
x =10
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