document.write( "Question 257267: In parallelogram DATE, m∠D = 8x - 20 and m∠A = 2x + 30. Find x. \n" ); document.write( "
Algebra.Com's Answer #189195 by drk(1908)\"\" \"About 
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In a parallelogram, 2 adjacent angles are supplementary, so, we get
\n" ); document.write( "\"8x-20+%2B+2x+%2B+30+=+180\"
\n" ); document.write( "combining like terms, we get
\n" ); document.write( "\"10x+%2B+10+=+180\"
\n" ); document.write( "\"10x+=+170\"
\n" ); document.write( "\"x+=+17\"
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