x+y=22 và 5x+8y=155. Tìm x và y
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While big cities k over at a fast pace, regional communities operate at the exact opposite. The Australian Unity Wellbeing Index has found that those who (1) live in rural areas experience significantly higher (2) level of wellbeing, with regional areas Maranoa in Queensland reporting levels of life satisfaction (3) the highest in the country. Australians living in rural areas area also reported to be (4) more socially cohesive, feeling safer in their community and being more ly to give back in the (5) form of volunteer work. Rural homeowners are often less stressed and feel more connected with those in their neighborhood (6) when compared to those who live in cities. Is the country life for (7) everyone ? Sure, it has its benefits, but not everyone is ready for a slowdown in their life pace. There are also notable drawbacks, such as a longer commute for those who are still working (8) in the city. If you're looking to escape the hustle (9) and bustle, however, a move to a larger and more affordable property in the countryside might just be the (10) answer to your problems.
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câu này lớp 3 cũng làm được nói chi lớp 7
mà đây là Toán chứ có phải là Tiếng Anh đâu
LẠC ĐỀ BẠN Ê
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Bạn tham khảo link này nhé!
https://h.vn/hoi-dap/question/424498.html
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a
\(x+3⋮x\)
\(\Leftrightarrow3⋮x\)
\(\Leftrightarrow x\inƯ\left(3\right)\)
\(\Leftrightarrow x\in\left\{1;3;-1;-3\right\}\)
b
\(x+y+xy=4\)
\(\Leftrightarrow x\left(y+1\right)+\left(y+1\right)=5\)
\(\Leftrightarrow\left(x+1\right)\left(y+1\right)=5\)
Xét ước đi là ra
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Vậy đề bài và câu hỏi là gì thế?
TL: ko có câu hỏi nên ko thể làm!
~HOK TỐT~
bạn nào giúp mình với mình đang cần rất gấp
x+y=22 và 5x+8y=155
Giải
C1: x+y=22
=> y=22-x (*)
Thay (*) vào 5x + 8y=155, ta có:
5x + 8(22-x) =1 55
5x + 176 - 8x = 155
5x - 8x = 155-176
-3x = -21
x= (-21) : (-3)
x= 7
x + y = 22
7 + y = 22
=> y = 22-7
y = 15
Vậy: x=7; y=15
C2: Bạn có thể suy ra x thay vì y ở bước đầu, kết quả vẫn giống nha ~