<PRE><B>Question 1054850</B>
40 members: 70% of the members are girls
28 Girls and 12 Boys
|60% = 60/100 = 6/10 = 3/5
{{{(28+x)/(40 + x + (x+6)) = 3/5}}}
{{{(28+x)/(46 + 2x) = 3/5}}} | Cross Multiplying to solve
3(46+2x) = 5(28+x)
138 + 6x = 140 + 5x
x = 2 girls added AND 8 boys added {{{2+6}}}
18 {{{12+6}}} in total are boys
checking
30girls/50total = 60/100  0r 60% girls CHECKS!

</PRE>