问题 解答题
解方程.
0.75x+3×0.8=7.5
2x
0.6
=
0.9
3
答案

(1)0.75x+3×0.8=7.5,

0.75x+2.4=7.5,

0.75x=7.5-2.4,

0.75x=5.1,

x=5.1÷0.75,

x=6.8;

(2)

2x
0.6
=
0.9
3

2x×3=0.6×0.9,

6x=0.54,

x=0.54÷6,

x=0.09.

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