SOLUTION: 80 girls and boys have planned for a movie. the are in a ratio of 6 girls to 2 boys. how many girls are there?

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Question 918023: 80 girls and boys have planned for a movie. the are in a ratio of 6 girls to 2 boys. how many girls are there?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +x+ = the number of girls
+80+-+x+ = the number of boys
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+x+%2F+%28+80+-+x+%29+=+6%2F2+
+x+%2F+%28+80+-+x+%29+=+3%2F1+
+x+=+3%2A%28+80+-+x+%29+
+x+=+240+-+3x+
+4x+=+240+
+x+=+60+
There are 60 girls
check:
+x+%2F+%28+80+-+x+%29+=+3%2F1+
+60+%2F+20+=+3%2F1+
+3%2F1+=+3%2F1+
OK