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