问题
解答题
解方程. 0.75x+3×0.8=7.5
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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.
解方程. 0.75x+3×0.8=7.5
|
(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.