题目内容
解方程或比例.
4x+3.6×5=50
=
x-80% x=5.
4x+3.6×5=50
| 1.75 |
| 3 |
| x |
| 6 |
x-80% x=5.
(1)4x+3.6×5=50,
4x+18=50,
4x+18-18=50-18,
4x÷4=32÷4,
x=8;
(2)
=
,
3x=1.75×6,
3x÷3=10.5÷3,
x=3.5;
(3)x-80%x=5,
0.2x=5,
0.2x÷0.2=5÷0.2,
x=25.
4x+18=50,
4x+18-18=50-18,
4x÷4=32÷4,
x=8;
(2)
| 1.75 |
| 3 |
| x |
| 6 |
3x=1.75×6,
3x÷3=10.5÷3,
x=3.5;
(3)x-80%x=5,
0.2x=5,
0.2x÷0.2=5÷0.2,
x=25.
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