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9x除以4.5等于5乘以0.
人气:460 ℃ 时间:2020-06-23 22:46:07
解答
9x÷4.5 = 5x0.3
9x = 1.5x4.5
x = 1.5x4.5÷9
x = 1.5x0.5
x =0.75
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