$#Dino$
`a) -1/3.x-1=2/5`
`⇒-1/3x=2/5+1=7/5`
`⇒x=7/5:(-1)/3=-15/7`
.........................
`b) 3/4.x+1/2=-3/5`
`⇒3/4x=-3/5-1/2=-11/10`
`⇒x=-11/10:3/4=-22/15`
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`c) 3x-1/7=1/14-1/21`
`⇒3x=1/7+1/14-1/21`
`⇒3x=4/21`
`⇒x=4/21:3=4/63`
.............................
`d) -5.|2x+3|=-1/2`
`⇒|2x+3|=-1/2:(-5)=1/10`
`1) 2x+3=1/10⇒x=-29/20`
`2) 2x+3=-1/10⇒x=-1/14`