Question

Tim X
a. 22/5:X=44/5:5/2
b. 8,35xX+6,65xX=45

Answer 1

a)\(\frac{22}{5}:x=\frac{44}{5}:\frac{5}{2}=\frac{44}{5}.\frac{2}{5}=\frac{84}{25}\)

\(\Rightarrow x=\frac{22}{5}:\frac{84}{25}=\frac{22}{5}.\frac{25}{84}=\frac{55}{42}\)

b) \(8,35x+6,65x=45\)

\(\Rightarrow\left(8,35+6,65\right)x=45\Rightarrow15x=45\)

\(\Rightarrow x=45:15=3\)

Answer 2

\(a,\frac{22}{5}\div x=\frac{44}{5}\div\frac{5}{2}\)

\(\Rightarrow\frac{22}{5}\div x=\frac{88}{25}\)

\(\Rightarrow x=\frac{5}{4}\)

\(b,8,35\times x+6,65\times x=45\)

\(\Rightarrow x\times\left(8,35+6,65\right)=45\)

\(\Rightarrow x\times15=45\)

\(\Rightarrow x=3\)

~Study well~

#Thạc_Trân

Answer 3

a) \(\frac{22}{5}:x=\frac{44}{5}:\frac{5}{2}\)
    \(\frac{22}{5}:x=\frac{88}{25}\)
              \(x=\frac{22}{5}:\frac{88}{25}\)
              \(x=\frac{5}{4}\)
b) \(8,35.x+6,65.x=45\)
  \(\left(8,35+6,65\right).x=45\)
                            \(15.x=45\)
                                   \(x=45:15\)
                                   \(x=3\)
- Dấu . là dấu nhân

Answer 4

a) \(\frac{22}{5}:X=\frac{44}{5}:\frac{5}{2}\)

\(\Rightarrow\frac{22}{5}:X=\frac{44}{5}\)

\(\Rightarrow X=\frac{22}{5}:\frac{44}{5}\)

\(\Rightarrow X=\frac{1}{2}\)

Vậy \(X=\frac{1}{2}\)

b)\(8,35.X+6.65.X=45\)      ( Dấu chấm là nhân nha )

\(X.\left(8.35+6.65\right)=45\)

\(X.15=45\)

\(X=45:15\)

\(X=3\)

Vậy X=3