Question

Answer 1

a: =>1/3-5x=32/15:(-8/15)=-4

=>5x=1/3+4=13/4

=>x=13/2-0

b: =>x^2+1/9=5/9

=>x^2=4/9

=>x=2/3 hoặc x=-2/3

Answer 2

`a) 2 2/15:(1/3 -5x)=-2 2/5`

`32/15 :(1/3 -5x) = -12/5`

`1/3-5x =32/15 :(-12/5)=-8/9`

`5x = 1/3-(-8/9) =11/9`

`x =11/9 :5 =11/45`

`b) x^2 +1/9 =5/3 :3`

`x^2 +1/9 =5/9`

`x^2 =5/9 -1/9 =4/9`

`=> x = +-2/3`