Question

Tìm x biết 

x+x: 55,5=315

Answer 1

x+x:55,5=315

x.1+x:55,5=315

x.(1+55,5)=315

x.56,5=315

x       =315:55,5

x       =\(\frac{210}{37}\)

Answer 2

\(x+x:55,5=315\)

\(x+x.\frac{2}{111}=315\)

\(x\left(1+\frac{2}{111}\right)=315\)

\(x.\frac{113}{111}=315\)

\(x=315:\frac{113}{111}\)

\(x=\frac{34965}{113}\)