4.4x+5.5x=99   (解方程)

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4.4x+5.5x=99   (解方程)

4.4x+5.5x=99   (解方程)
4.4x+5.5x=99   (解方程)

4.4x+5.5x=99   (解方程)
4.4x+5.5x=99
9.9x=99
x=99/9.9
x=10

4.4x+5.5x=99   
(4.4+5.5)x=99
9.9x=99
x=10

4.4x+5.5x=99   
9.9x=99
x=10

4.4x+5.5x=99
9.9x=99
x=10

4.4x+5.5x=99
(4.4+5.5)x=99
x=99/9.9
x=10

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