Help meeeeee Hứa vote 5 sao và ctlhn ạ

`#Yaii `
`a)1/2+2/3:x=-5/4 `

`<=>2/3:x=(-5/4)-1/2 `

`<=>2/3:x=-7/4 `

`<=>x=2/3:(-7/4) `

`<=>x=-8/21 `

`=> ` Vậy `x=-8/21 `

`b)1/2-|x+1/3|=2/3 `

`<=>|x+1/3|=1/2-2/3 `

`<=>|x+1/3|=-1/6(vô  lí) `

`c)(x-2/3)^2=1/9 `

`<=>(x-2/3)^2=(1/3)^2 `

`<=>x-2/3=+-1/3 `

`TH1:x-2/3=1/3 `

`<=>x=1 `

`TH2:x-2/3=-1/3 `

`<=>x=1/3 `

`=> ` Vậy `x∈{1;1/3} `

`d)2^(x-3)-3.2^x=-92 `

`<=>2^x  .2^(-3)-3.2^x=-92 `

`<=>2^x  .(2^(-3)-3)=-92 `

`<=>2^x  .(1/8-3)=-92 `

`<=>2^x  .(-23)/8=-92 `

`<=>2^x=-92:(-23)/8 `

`<=>2^x=32=2^5 `

`<=>x=5 `

`=> ` Vậy `x=5 `