Question

Help and explain explain !!!!!!!!!!

Answer 1

`x=-1\text{ or }x=11`

Explanation:

For
`a=|b|`, we have two cases:

`\begin{cases}a=b,\\a=-b\end{cases}`

Therefore, for
`18=|15-3x|`, we have the following cases:

`\begin{cases}18=15-3x,\\18=-(15-3x)\end{cases}`

Solving, we have:

`\begin{cases}18=15-3x, -3x=3, x=\boxed{-1},\\18=-(15-3x), 18=-15+3x, 33=3x, x=\boxed{11}\end{cases}`.

Therefore,

`\implies \boxed{x=-1\text{ or }x=11}`