Question 347123
girls=x
boys=2x
x+2x=18
3x=18
x=6
2x=12
It is easier to set up the problem this way.
Build from the smallest to largest.
Either way works, but the first sample is for us lazy folks.
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but
b+1/2b=18
1.5b=18
b=12
1/2b=6
Have a good day.
bob