الصوت الساكن
Professor Jorge Abreu
A pegadinha é a mesma do livro: quase todo mundo calcula errado fazendo 18 + 9 = 27 (tiram metade do valor fixo, não do preço total). O correto é montar a equação (x = preço do caderno): Preço total = 18 reais + metade do preço total x = 18 + x/2 Resolvendo: 1. Multiplica tudo por 2 para tirar a fração: 2x = 36 + x 2. Isola o x: 2x - x = 36 3. Resultado: x = 36 reais ✅ Resposta certa: alternativa b ❌ Erro comum (90% dos casos): alternativa a #matematica #raciociniologico
تابع
41
7
3
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