Câu hỏi của Gia Huy To

Question

giúp em 3 bài này em cảm ơn trc ạ

HT.Phong (9A5) · Accepted Answer

Bài 8:a)$2x-\dfrac{3}{5}=\dfrac{28}{15}\cdot\dfrac{6}{35}$$\Rightarrow2x-\dfrac{3}{5}=\dfrac{8}{25}$$\Rightarrow2x=\dfrac{8}{25}+\dfrac{3}{5}$$\Rightarrow2x=\dfrac{23}{25}$$\Rightarrow x=\dfrac{23}{25}:2=\dfrac{23}{50}$b) $\dfrac{8}{23}\cdot\dfrac{46}{24}-x=\dfrac{1}{3}$$\Rightarrow\dfrac{2}{3}-x=\dfrac{1}{3}$$\Rightarrow x=\dfrac{2}{3}-\dfrac{1}{3}$$\Rightarrow x=\dfrac{1}{3}$c) $\dfrac{3}{22}-\dfrac{3}{4}x=\dfrac{27}{121}\cdot\dfrac{11}{9}$$\Rightarrow\dfrac{3}{22}-\dfrac{3}{4}x=\dfrac{3}{11}$$\Rightarrow\dfrac{3}{4}x=\dfrac{3}{22}-\dfrac{3}{11}$$\Rightarrow\dfrac{3}{4}x=-\dfrac{3}{22}$$\Rightarrow x=\dfrac{-3}{22}:\dfrac{3}{4}=-\dfrac{2}{11}$d) $1-\dfrac{2}{3}x=\dfrac{49}{15}\cdot\dfrac{5}{7}$$\Rightarrow1-\dfrac{2}{3}x=\dfrac{7}{3}$$\Rightarrow\dfrac{2}{3}x=1-\dfrac{7}{3}$$\Rightarrow\dfrac{2}{3}x=\dfrac{-4}{3}$$\Rightarrow x=\dfrac{-4}{3}:\dfrac{2}{3}=-2$Câu trả lời: Bài 8:a)$2x-\dfrac{3}{5}=\dfrac{28}{15}\cdot\dfrac{6}{35}$$\Rightarrow2x-\dfrac{3}{5}=\dfrac{8}{25}$$\Rightarrow2x=\dfrac{8}{25}+\dfrac{3}{5}$$\Rightarrow2x=\dfrac{23}{25}$$\Rightarrow x=\dfrac{23}{25}:2=\dfrac{23}{50}$b) $\dfrac{8}{23}\cdot\dfrac{46}{24}-x=\dfrac{1}{3}$$\Rightarrow\dfrac{2}{3}-x=\dfrac{1}{3}$$\Rightarrow x=\dfrac{2}{3}-\dfrac{1}{3}$$\Rightarrow x=\dfrac{1}{3}$c) $\dfrac{3}{22}-\dfrac{3}{4}x=\dfrac{27}{121}\cdot\dfrac{11}{9}$$\Rightarrow\dfrac{3}{22}-\dfrac{3}{4}x=\dfrac{3}{11}$$\Rightarrow\dfrac{3}{4}x=\dfrac{3}{22}-\dfrac{3}{11}$$\Rightarrow\dfrac{3}{4}x=-\dfrac{3}{22}$$\Rightarrow x=\dfrac{-3}{22}:\dfrac{3}{4}=-\dfrac{2}{11}$d) $1-\dfrac{2}{3}x=\dfrac{49}{15}\cdot\dfrac{5}{7}$$\Rightarrow1-\dfrac{2}{3}x=\dfrac{7}{3}$$\Rightarrow\dfrac{2}{3}x=1-\dfrac{7}{3}$$\Rightarrow\dfrac{2}{3}x=\dfrac{-4}{3}$$\Rightarrow x=\dfrac{-4}{3}:\dfrac{2}{3}=-2$

Gia Huy To · Answer

thankCâu trả lời: thank

Chúng tôi đề xuất

Tài nguyên

Ứng dụng mobile

Bảng xếp hạng

Các khóa học có thể bạn quan tâm

Yêu cầu VIP