document.write( "Question 872400: What is the value of x if (2x+10)° is supplementary to (2x+30)°?
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Algebra.Com's Answer #526128 by Fombitz(32388) $\"\"$ $\"About$

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SInce they're supplementary,
\n" ); document.write( " $\"2x%2B10%2B2x%2B30=180\"$
\n" ); document.write( " $\"4x=140\"$
\n" ); document.write( " $\"x=35\"$
\n" ); document.write( "So then,
\n" ); document.write( " $\"2x%2B10=2%2835%29%2B10=80\"$
\n" ); document.write( " $\"2x%2B30=2%2835%29%2B30=100\"$
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