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$#Aridoto$

`a, x-3/7=7/8` 

`x=7/8+3/7`

`x=73/56`

`b, 1/3+2/3:x=-7`

`2/3:x=-7-1/3`

`2/3:x=-22/3`

`x=2/3:(-22/3)`

`x=-1/11`

`c, 2/3:x=1,4-12/5`

`2/3:x=-43/20`

`x=2/3:(-43/20)`

`x=-40/129`

`d, (4,5-2x)·1\frac{4}{7}=11/14`

`(4,5-2x)·\frac{11}{7}=11/14`

`4,5-2x=11/14:11/7`

`4,5-2x=1/2`

`2x=4,5-1/2`

`2x=4`

`x=4:2`

`x=2`

`e, 2(1/2x-1/3)-3/2=1/4`

`x-2/3=1/4+3/2`

`x-2/3=7/4`

`x=7/4+2/3`

`x=29/12`

`f, -2/3x+1/5=1/10`

`-2/3x=1/10-1/5`

`-2/3x=-1/10`

`x=(-1/10):(-2/3)`

`x=3/20`

`g, 2/3(x-25%)=1/6`

`x-1/4=1/6:2/3`

`x-1/4=1/4`

`x=1/4+1/4`

`x=1/2`