Tìm x A)(x-36)+18=12 B)10+2x=45÷43 C)2x=10 D)x mũ 50=x

Giải thích các bước giải:

`a)`

`(x-36)+18=12`
`=>x-36=12-18`
`=>x-36=-6`
`=>x=-6+36`
`=>x=30`
`b)`

`10+2x=45:43`
`=>10+2x=45/43`
`=>2x=45/43-10`
`=>2x=-385/43`
`=>x=-385/43:2`
`=>x=-385/86`
`c)`

`2x=10`
`=>x=10:2`
`=>x=5`
`d)`

`x^50=x`
`=>x^50-x=0`
`=>x^49 . x-x.1=0`
`=>x.(x^49-1)=0`
`=>`\(\left[ \begin{array}{l}x=0\\x^{49}-1=0\end{array} \right.\) 
`=>`\(\left[ \begin{array}{l}x=0\\x^{49}=0+1\end{array} \right.\) 
`=>`\(\left[ \begin{array}{l}x=0\\x^{49}=1\end{array} \right.\) 
`=>`\(\left[ \begin{array}{l}x=0\\x=1\end{array} \right.\)