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yi yuan yi ci fang cheng ji chu zhi shi jing jiang
Pages: 7-9
Year: Issue:  11
Journal: School Journal of Mathematics

Keyword:  解方程一次方程未知数对等式相等关系性质变形基础知识式子等号;
Abstract: <正>1.等式与方程表示相等关系的式子叫做等式.含有未知数的等式叫做方程.可见方程必须具备两个条件:一是必须含有未知数,二是必须是一个等式.例1判断下列各式是不是方程:
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