document.write( "Question 983422: Given that a - b = 10 and 2 (a^2 - b^2) = 640 .find the value of a + b\r
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Algebra.Com's Answer #604218 by Fombitz(32388)\"\" \"About 
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\"%28a-b%29%28a%2Bb%29=a%5E2-b%5E2\"
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