`(2-x)/4=(3x-1)/(-3)`
`<=> (-3)(2-x) = 4(3x-1)`
`<=> -6+3x=12x-4`
`<=> 3x-12x=-4+6`
`<=> -4x=2`
`<=> x=-1/2`
.
`(12-3x)/32=6/(4-x)`
`<=> 6.32 = (12-3x)(4-x)`
`<=> 192 = 3(4-x)(4-x)`
`<=> (4-x)^2=64`
`<=> (4-x)^2=8^2=(-8)^2`
`<=>` \(\left[ \begin{array}{l}4-x=8\\4-x=-8\end{array} \right.\)
`<=>` \(\left[ \begin{array}{l}x=-4\\x=12\end{array} \right.\)
