Question

1.25x÷0.25=4 3/4 x-1/3x=5/9 解方程

1.25x÷0.25=4
3/4 x-1/3x=5/9
解方程

Answer 1

1.25x÷0.25=4
两边同时乘以0.25
得1.25x=1
两边同时除以1.25
得x=0.8

3/4 x-1/3x=5/9
左边合并同类项
得（3/4-1/3）x=5/9
即5/12 x=5/9
两边同时乘以12/5
得x=4/3

Answer 2

1.25x÷0.25=4
1.25x=4x0.25
1.25x=1
x=1÷1.25
x=0.8

3/4 x-1/3x=5/9
9/12x-4/12x=5/9
5/12x=5/9
x=5/9x5/12
x=3/4