Question

8×1/2-x=49/65×5/7

Answer 1

\(8.\frac{1}{2}-x=\frac{49}{65}.\frac{5}{7}\)

\(4-x=\frac{7}{13}\)

\(x=4-\frac{7}{13}\)

\(x=\frac{45}{13}\)

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Answer 2

đề phải như này không ạ 

\(8.\frac{1}{2}-x=\frac{49}{65}.\frac{5}{7}\)

\(< =>\frac{8}{2}-x=\frac{49}{65}.\frac{5}{7}\)

\(< =>\frac{8}{2}-\frac{2x}{2}=\frac{7.7.5}{13.5.7}\)

\(< =>\frac{8-2x}{2}=\frac{7}{13}\)

\(< =>\left(8-2x\right)13=14\)

\(< =>8-2x=\frac{14}{13}\)

\(< =>-2x=\frac{14}{13}-8=-\frac{90}{13}\)

\(< =>x=\frac{45}{13}\)

Answer 3

8×1/2-x=49/65×5/7

8×1/2-x=7/13

1/2-x=7/13:8

1/2-x=7/104

x=1/2-7/104

x=45/104

vậy x=45/104

Answer 4

\(8\cdot\frac{1}{2}-x=\frac{49}{65}\cdot\frac{5}{7}\)

\(\frac{8}{2}-x=\frac{245}{455}\)

\(4-x=\frac{7}{13}\)

\(x=4-\frac{7}{13}\)

\(x=3\frac{6}{13}\)

Answer 5

8×1/2-x=49/65×5/7

8×1/2-x=7/13

4-x=7/13

x=4-7/13

x=45/13

vậy x=45/13

Answer 6

\(8\times\frac{1}{2}-x=\frac{49}{65}\times\frac{5}{7}\)

\(4-x=\frac{7}{13}\)

\(x=\frac{45}{13}\)

Vậy : \(x=\frac{45}{13}\)