问题
解答题
解方程.
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答案
(1)x-80%x=48,
(1-0.8)x=48,
0.2x=48,
0.2x÷0.2=48÷0.2,
x=240;
(2)75%x-5×
=6,3 5
0.75x-3=6,
0.75x-3+3=6+3,
0.75x=9,
0.75x÷0.75=9÷0.75,
x=12.
解方程.
|
(1)x-80%x=48,
(1-0.8)x=48,
0.2x=48,
0.2x÷0.2=48÷0.2,
x=240;
(2)75%x-5×
=6,3 5
0.75x-3=6,
0.75x-3+3=6+3,
0.75x=9,
0.75x÷0.75=9÷0.75,
x=12.