document.write( "Question 1035585: If A-B=30 and A+B=60 find the value of A and B \n" ); document.write( "

Algebra.Com's Answer #650225 by ikleyn(52781) $\"\"$ $\"About$

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\n" ); document.write( "If A-B=30 and A+B=60 find the value of A and B
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document.write( "A - B = 30,    (1)\r\n" );
document.write( "A + B = 60.    (2)\r\n" );
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document.write( "Once you see two equations like (1) and (2), add them immediately. You will get\r\n" );
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document.write( "2A = 30 + 60 = 90 --->  A =  = 45.\r\n" );
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document.write( "Thus you just found one unknown.\r\n" );
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document.write( "Now from (2)  B = 60 - A = 60 - 45 = 15.\r\n" );
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document.write( "The problem is solved.  A = 45, B = 15.\r\n" );
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