Question

38-2.(3x-1)=10

5.(x-2)=20

9.3^x=3²⁰²²:3²⁰²¹

Answer 1

`38-2.(3x-1)=10`

`2.(3x-1)=38-10=28`

`3x-1=28:2=14`

`3x=14+1=15`

`x=15:3=5`

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`5.(x-2)=20`

`x-2=20:5=4`

`x=4+2=6`

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`9.3^x=3^2022 :3^2021`

`3^2 .3^x=3^[2022-2021]`

`3^[2+x]=3^1`

`2+x=1`

`x=1-2=-1`

Answer 2

`38-2.(3x-1)=10`

`=> 2.(3x-1)=38-10`

`=> 2.(3x-1)=28`

`=>3x-1=28:2`

`=>3x-1=14`

`=>3x=14+1`

`=>3x=15`

`=>x=15:3`

`=>x=5`

`-----------`

`5.(x-2)=20`

`=>x-2=20:5`

`=>x-2=4`

`=>x=4+2`

`=>x=6`

`---------`

`9.3^x=3^(2022):3^(2021)`

`=>3^2 .3^x=3^1`

`=>3^(2+x)=3^1`

`=>2+x=1`

`=>x=-1`