[3/4+2/3×21/8]÷0.25===4.5x+x=11/175-5/6x=1/3

[3/4+2/3×21/8]÷0.25===4.5x+x=11/175-5/6x=1/3
[3/4+2/3×21/8]÷0.25
=
=
=
4.5x+x=11/17
5-5/6x=1/3

[3/4+2/3×21/8]÷0.25===4.5x+x=11/175-5/6x=1/3

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（3/4+7/4）/0.25=10/4/0.25=10

[3/4+2/3×21/8]÷0.25
=[3/4+7/4]÷1/4
=5/2×4
=10
4.5x+x=11/17
5.5x=11/17
11/2x =11/17
x=11/17÷11/2
x=11/17×2/11
x=2/17
...

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[3/4+2/3×21/8]÷0.25
=[3/4+7/4]÷1/4
=5/2×4
=10
4.5x+x=11/17
5.5x=11/17
11/2x =11/17
x=11/17÷11/2
x=11/17×2/11
x=2/17
5-5/6x=1/3
5/6x=5-1/3
5/6x=14/3
x=14/3÷5/6
x=14/3×6/5
x=28/5

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