www.5129.net > (x 1.5x)x16 8x=26.4解方程

(x 1.5x)x16 8x=26.4解方程

66

224+20x=544 20x=320 x=16

0.5X16-16X0.2=4X 8-3.2=4x 4x=4.8 x=1.2

2.5x16一7x=12 40一7x=12 7x=28 x=4

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