`816 :(372-y)=8`

`372-y=816:8`

`372-y=102`

`y=372-102`

`y= 270`

\(2-\dfrac{3}{5}\\ =\dfrac{10}{5}-\dfrac{3}{5}\\ =\dfrac{7}{5}\\ \dfrac{5}{7}:6\\ =\dfrac{5}{7}\times\dfrac{1}{6}\\ =\dfrac{5}{42}\\ 5:\dfrac{3}{2}\\ =5\times\dfrac{2}{3}\\ =\dfrac{10}{3}\)

`3/2 x -1 =1/2x -3/5`

`=> 3/2x -1/2x = -3/5 +1`

`=> 2/2x= -3/5 + 5/5`

`=> x= 2/5`

__

`1/2x +1/2(x-2) = 3/4 -2x`

`=> 1/2x + 1/2x - 2/2 = 3/4 -2x`

`=> 1/2x +1/2x +2x = 3/4 + 1`

`=> 1/2x +1/2x + 4/2x = 3/4 +4/4`

`=> 6/2x = 7/4`

`=> x= 7/4 : 3`

`=>x=7/12`

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`(x-1/2) -1/4=0`

`=> x-1/2=1/4`

`=> x=1/4 +1/2`

`=> x= 1/4 +2/4`

`=>x=3/4`

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`4^(x-3) +1=17`

`=> 4^(x-3) =17-1`

`=> 4^(x-3)=16`

`=> 4^(x-3)=4^2`

`=> x-3=2`

`=>x=2+3`

`=>x=5`