document.write( "Question 1047794: Solve system of equation by elimination:
\n" ); document.write( "5b = 20 + 2a
\n" ); document.write( "2a + 4b = 7
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Algebra.Com's Answer #663319 by Alan3354(69443)\"\" \"About 
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5b = 20 + 2a --> 2a - 5b = -20
\n" ); document.write( "2a + 4b = 7
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\n" ); document.write( "2a - 5b = -20
\n" ); document.write( "2a + 4b = 7
\n" ); document.write( "--------------------- Subtract
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