解方程.1.2+¾x=23 2.3x+2/5×15=21 3 x+0.4x=2解方程.1.2+¾x=23 2.3x+2/5×15=21 3 x+0.4x=21 (方法)
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解方程.1.2+¾x=23 2.3x+2/5×15=21 3 x+0.4x=2解方程.1.2+¾x=23 2.3x+2/5×15=21 3 x+0.4x=21 (方法)
解方程.1.2+¾x=23 2.3x+2/5×15=21 3 x+0.4x=2
解方程.1.2+¾x=23 2.3x+2/5×15=21 3 x+0.4x=21 (方法)
解方程.1.2+¾x=23 2.3x+2/5×15=21 3 x+0.4x=2解方程.1.2+¾x=23 2.3x+2/5×15=21 3 x+0.4x=21 (方法)