x+1.8=4.2 x+1.8-1.8=4.2-1.8 x=2.4 怎么检验

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x+1.8=4.2 x+1.8-1.8=4.2-1.8 x=2.4 怎么检验

x+1.8=4.2 x+1.8-1.8=4.2-1.8 x=2.4 怎么检验
x+1.8=4.2 x+1.8-1.8=4.2-1.8 x=2.4 怎么检验

x+1.8=4.2 x+1.8-1.8=4.2-1.8 x=2.4 怎么检验
检验
将x=2.4代人左边,
x+1.8=2.4+1.8=4.2 =右边

2.4+1.8=4.2