baeethtsadia
13.11.2019 •
Mathematics
Joey has a collection of model cars. his favorite are the red ones, which make up 30% of his collection. if there are 27 red ones, how many model cars does joey have?
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Ответ:
7
Step-by-step explanation:
-13=4(v+2)-7v
-13=4v+8-7v
-13=4v-7v+8
-13=-3v+8
-3v=-13-8
-3v=-21
3v=21
v=21/3
v=7