document.write( "Question 201706: find angle A if it supplements angle B which is equal to 70-x \n" ); document.write( "
Algebra.Com's Answer #151934 by RAY100(1637)\"\" \"About 
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A + B = 180,,,,def supplementary
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\n" ); document.write( "B= (70-x),,,,given
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\n" ); document.write( "A +(70-x) =180
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\n" ); document.write( "A + (70-x) = 180
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\n" ); document.write( "A = 180 -70 +x
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\n" ); document.write( "A= 110 +x
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\n" ); document.write( "check, x=10, (70-x) =60,,,A=120,,,answer,,,110+10=120,,,,ok
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