解方程.6×9-12
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解方程.
6×9-
6×9-
1 |
2 |
![解方程.6×9-12](/uploads/image/z/18995488-16-8.jpg?t=%E8%A7%A3%E6%96%B9%E7%A8%8B%EF%BC%8E6%C3%979-12)
(1)6×9-
1
2x=26.8
54-
1
2x+
1
2x=26.8+
1
2x
54-26.8=26.8+
1
2x-26.8
27.2÷
1
2=
1
2x÷
1
2
x=54.4;
(2)
0.75
x=1.25÷2
0.75
x×x=0.625×x
0.75÷0.625=0.625x÷0.625
x=1.2.
1
2x=26.8
54-
1
2x+
1
2x=26.8+
1
2x
54-26.8=26.8+
1
2x-26.8
27.2÷
1
2=
1
2x÷
1
2
x=54.4;
(2)
0.75
x=1.25÷2
0.75
x×x=0.625×x
0.75÷0.625=0.625x÷0.625
x=1.2.