Question

 x% :3+45%=0,7

 

 

 

Answer 1

\(x\%:3+45\%=0,7\)

\(\Rightarrow x\%:3+0,45=0,7\)

\(\Rightarrow x\%:3=0,7-0,45\)

\(\Rightarrow x\%:3=0,25\)

\(\Rightarrow x\%=0,25.3\)

\(\Rightarrow x\%=0,75\)

\(\Rightarrow x\%=75\%\)

\(\Rightarrow x=75\)

Vậy \(x=75\)

Answer 2

\(x\%:3+45\%=0,7\)

\(\Rightarrow\frac{x}{300}+0,45=0,7\)

\(\Rightarrow x:300=0,25\)

\(\Rightarrow x=75\)

Answer 3

đáp án 

x = 75 

hok tốt