Question

Tìm x:

\(2^1_2x+x=2^2_{15}\)

Answer 1

2\(\frac{1}{2}\)x+x=2\(\frac{2}{15}\)\(\Rightarrow\)\(\frac{5}{2}\)x+x=\(\frac{32}{15}\)\(\Rightarrow\)x(\(\frac{5}{2}\)+1)=\(\frac{32}{15}\)\(\Rightarrow\)x.\(\frac{7}{2}\)=\(\frac{32}{15}\)\(\Rightarrow\)x=\(\frac{32}{15}\):\(\frac{7}{2}\)\(\Rightarrow\)x=\(\frac{32}{15}\).\(\frac{2}{7}\)\(\Rightarrow\)x=\(\frac{64}{105}\)

Answer 2

Giải

\(2\frac{1}{2}x-x=2\frac{2}{15}=>\frac{5}{2}x-x=\frac{32}{15}=>x\left(\frac{5}{2}-1\right)=\frac{32}{15}=>x.\frac{7}{2}=\frac{32}{15}=>x=\frac{32}{15}:\frac{7}{2}=>x=\frac{64}{105}\)

Answer 3

mk viết lộn dấu + thành -

Answer 4

5/2x + x = 32/15

(5/2 -1)x = 32/15

3/2x = 32/15

x = 32/15: 3/2

x = 32/15 . 2/3

x =64/45

Vay x = 64/45