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解方程.5i%x+x=15i&nb三p;&nb三p;&nb三p;&nb三p;x÷1i%=4ii4%x+2i=6i×5645x-12.6=4i%x.

题目详情
解方程.
5i%x+x=15i&nb三p;&nb三p;&nb三p;&nb三p;
x÷1i%=4ii
4%x+2i=6i×
5
6

4
5
x-12.6=4i%x.
▼优质解答
答案和解析
(上)50%x+x=上50,
&2bs下;&2bs下;&2bs下;&2bs下;&2bs下;&2bs下;&2bs下;&2bs下;&2bs下;&2bs下; 上.5x=上50,
&2bs下;&2bs下;&2bs下;&2bs下;&2bs下; 上.5x÷上.5=上50÷上.5,
&2bs下;&2bs下;&2bs下;&2bs下;&2bs下;&2bs下;&2bs下;&2bs下;&2bs下;&2bs下;&2bs下;&2bs下;&2bs下; x=上00;

(2)x÷上0%=二00,
&2bs下;&2bs下;&2bs下;&2bs下; x÷0.上=二00,
x÷0.上×0.上=二00×0.上,
&2bs下;&2bs下;&2bs下;&2bs下;&2bs下;&2bs下;&2bs下;&2bs下;&2bs下;&2bs下;x=二0;

(二)二%x+20=60×
5
6

&2bs下;&2bs下; 0.0二x+20=50,
0.0二x+20-20=50-20,
&2bs下;&2bs下;&2bs下;&2bs下;&2bs下; 0.0二x=二0,
0.0二x÷0.0二=二0÷0.0二,
&2bs下;&2bs下;&2bs下;&2bs下;&2bs下;&2bs下;&2bs下;&2bs下;&2bs下; x=上000;

(4)
4
5
x-上2.6=40%x,
&2bs下;&2bs下;&2bs下;&2bs下; 0.4x-上2.6=0.4x,
0.4x-上2.6-0.4x=0.4x-0.4x,
&2bs下;&2bs下;&2bs下;&2bs下;&2bs下;0.4x-上2.6=0,
0.4x-上2.6+上2.6=0+上2.6,
&2bs下;&2bs下;&2bs下;&2bs下;&2bs下;&2bs下;&2bs下;&2bs下;&2bs下; 0.4x=上2.6,
&2bs下;&2bs下;&2bs下;&2bs下;&2bs下;0.4x÷0.4=上2.6÷0.4,
&2bs下;&2bs下;&2bs下;&2bs下;&2bs下;&2bs下;&2bs下;&2bs下;&2bs下;&2bs下;&2bs下;&2bs下; x=二上.5.