document.write( "Question 825151: if 3/4 of the pupils were boys and there were 240 girls,how many boys were in the school? \n" ); document.write( "

Algebra.Com's Answer #497133 by TimothyLamb(4379) $\"\"$ $\"About$

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\n" ); document.write( "N = number of students
\n" ); document.write( "b = number of boys
\n" ); document.write( "g = number of girls
\n" ); document.write( "---
\n" ); document.write( "N = b + g
\n" ); document.write( "b = (3/4)N
\n" ); document.write( "b = (3/4)(b + g)
\n" ); document.write( "b = (3/4)(b + 240)
\n" ); document.write( "b = (3/4)b + (3/4)240
\n" ); document.write( "b - (3/4)b = (3/4)240
\n" ); document.write( "(4/4)b - (3/4)b = (3/4)240
\n" ); document.write( "(1/4)b = (3/4)240
\n" ); document.write( "b = 4(3/4)240
\n" ); document.write( "b = (3)240
\n" ); document.write( "---
\n" ); document.write( "answer:
\n" ); document.write( "b = 720
\n" ); document.write( "---
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