Câu hỏi của tranthuylinh

Question

$\left\{{}\begin{matrix}x+y=1500\x+\dfrac{75}{100}x+y+\dfrac{68}{100}y=2583\end{matrix}\right.$

Nguyễn acc 2 · Accepted Answer

$\left\{{}\begin{matrix}x+y=1500\x+\dfrac{75}{100}x+y+\dfrac{68}{100}y=2583\end{matrix}\right.\
\Leftrightarrow\left\{{}\begin{matrix}x+y=1500\\left(x+y\right)+\dfrac{3}{4}x+\dfrac{17}{25}y=2583\end{matrix}\right.\ \Leftrightarrow\left\{{}\begin{matrix}x+y=1500\1500+\dfrac{3}{4}x+\dfrac{17}{25}y=2583\end{matrix}\right.\ \Leftrightarrow\left\{{}\begin{matrix}x+y=1500\\dfrac{3}{4}x+\dfrac{17}{25}y=1083\end{matrix}\right.\ \Leftrightarrow\left\{{}\begin{matrix}x=900\y=600\end{matrix}\right.$Câu trả lời: $\left\{{}\begin{matrix}x+y=1500\x+\dfrac{75}{100}x+y+\dfrac{68}{100}y=2583\end{matrix}\right.\
\Leftrightarrow\left\{{}\begin{matrix}x+y=1500\\left(x+y\right)+\dfrac{3}{4}x+\dfrac{17}{25}y=2583\end{matrix}\right.\ \Leftrightarrow\left\{{}\begin{matrix}x+y=1500\1500+\dfrac{3}{4}x+\dfrac{17}{25}y=2583\end{matrix}\right.\ \Leftrightarrow\left\{{}\begin{matrix}x+y=1500\\dfrac{3}{4}x+\dfrac{17}{25}y=1083\end{matrix}\right.\ \Leftrightarrow\left\{{}\begin{matrix}x=900\y=600\end{matrix}\right.$

Chúng tôi đề xuất

Tài nguyên

Ứng dụng mobile

Bảng xếp hạng

Các khóa học có thể bạn quan tâm

Yêu cầu VIP