document.write( "Question 821409: [ A two digit number is three times the sum of its digits. if 45 is added to the number, its digits are interchanged. what is the sum of the digits of the number ?
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Algebra.Com's Answer #494137 by TimothyLamb(4379)\"\" \"About 
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\n" ); document.write( "10y + x = 3(x + y)
\n" ); document.write( "10y + x + 45 = 10x + y
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\n" ); document.write( "put the system of linear equations into standard form
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\n" ); document.write( "10y + x = 3x + 3y
\n" ); document.write( "10y + x + 45 = 10x + y
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\n" ); document.write( "2x - 7y = 0
\n" ); document.write( "9x - 9y = 45
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\n" ); document.write( "copy and paste the above standard form linear equations in to this solver:
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\n" ); document.write( "answer:
\n" ); document.write( "x= 7
\n" ); document.write( "y= 2
\n" ); document.write( "number = 27
\n" ); document.write( "sum of the digits = 9
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\n" ); document.write( "Solve and graph linear equations:
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\n" ); document.write( "Solve quadratic equations, quadratic formula:
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\n" ); document.write( "Solve systems of linear equations up to 6-equations 6-variables:
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