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4x+2.9×3=15.1列方程
人气:112 ℃ 时间:2020-05-05 06:37:32
解答
4x+2.9×3=15.1
4x+8.7=15.1
4x=15.1-8.7
4x=5.4
x=5.4÷4
x=1.35
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