document.write( "Question 1170040: When 18 boys joined a group of y students, the ratio of boys to girls to girls in the group became 4:5. Write an algebraic expression for the number of girls in terms of y? \n" ); document.write( "
Algebra.Com's Answer #794922 by josgarithmetic(39618)\"\" \"About 
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18 boys is joined by a group of x girls and y boys.\r
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\n" ); document.write( "\n" ); document.write( "Ratio BOYS to GIRLS became \"4%2F5\".\r
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\n" ); document.write( "\n" ); document.write( "\"%28y%2B18%29%2Fx=4%2F5\"----------solve this for x, the asked-for number of girls.
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