Solve for x

\(7-2x=n-14\); solve for x

 

\(7-2x-7=n-14-7\)

 

\(2x-0=n-14-7\)

 

\(2x=n-14-7\)

 

\(2x=n-21\)

 

\(\frac{2x}{2}=\frac{n-21}{2}\)

 

\(1x=\frac{n-21}{2}\)

 

\(x=\frac{n}{2}-\frac{21}{2}\)

 

\(x=\frac{n}{2}-10.5\)

 

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\(7x-8=3x+12\); solve for x

 

\(7x-8+8=3x+12+8\)

 

\(7x+0=3x+12+8\)

 

\(7x=3x+12+8\)

 

\(7x=3x+20\)

 

\(7x-3x=3x+20-3x\)

 

\(4x=3x+20-3x\)

 

\(4x=20-0x\)

 

\(4x=20-0\)

 

\(4x=20\)

 

\(\frac{4x}{4}=\frac{20}{4}\)

 

\(1x=\frac{20}{4}\)

 

\(x=\frac{20}{4}\)

 

\(x=5\)