Respuesta :

asd233
If there is twice as many boys then girls, then there are 20 girls because 3x20=60
Hope I helped :-) and if you can please mark as best, thanks!
[tex]g-girls\\2g-boys\\\\g+2g=60\\3g=60\ \ \ \ |divide\ both\ sides\ by\ 3\\\boxed{g=20}\leftarrow answer[/tex]

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