问题
解答题
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答案
(1)
=1.75 3
,x 6
3x=1.75×6,
3x÷3=10.5÷3,
x=3.5:
(2)x-80%x=5,
0.2x=5,
0.2x÷0.2=5÷0.2,
x=25;
(3)4x+3.6×5=50,
4x+18=50,
4x+18-18=50-18,
4x÷4=32÷4,
x=8.
|
(1)
=1.75 3
,x 6
3x=1.75×6,
3x÷3=10.5÷3,
x=3.5:
(2)x-80%x=5,
0.2x=5,
0.2x÷0.2=5÷0.2,
x=25;
(3)4x+3.6×5=50,
4x+18=50,
4x+18-18=50-18,
4x÷4=32÷4,
x=8.