document.write( "Question 934395: the age of two sisters are 11 years and 19 years. in how many years' time will the sum of their ages be 70 years. form an equation.
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Algebra.Com's Answer #567413 by TimothyLamb(4379)\"\" \"About 
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x = number of years in future
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\n" ); document.write( "11 + x + 19 + x = 70
\n" ); document.write( "2x = 70 - 11 - 19
\n" ); document.write( "x = (70 - 11 - 19)/2
\n" ); document.write( "x = 20
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