`x=(-1)/2 + 3/4`
`x=(-2)/4+3/4`
`x=1/4`
___________________________
`x-1/5=2/11`
`x=2/11+1/5`
`x=10/55 + 11/55`
`x=21/55`
____________________
`x-5/6 = 16/42+(-8)/56`
`x-5/6=8/21 - 1/7`
`x-5/6 = 8/21 - 3/21`
`x-5/6 =5/21`
`x=5/21+5/6`
`x=15/14`
_____________________________
`x/5 = 5/6+(-19)/30`
`x/5 = 5/6-19/30`
`x/5 = 25/30 - 19/30`
`x/5 =6/30`
`x/5=1/5`
`x=1/5 : 5 = 1/5.5`
`x=1`
____________________________
`x=(-1)/2 + 3/4`
`x=(-2)/4+3/4`
`x=1/4`