Question

X x1,425+1,575 x X+X+X1,2=13

Answer 1

\(x\times1,425+1,575\times x+x+x\times1,2=13\)

\(\Rightarrow x\times\left(1,425+1,575+1+1,2\right)=13\)

\(\Rightarrow x\times5,2=13\)

\(\Rightarrow x=13\div5,2\)

\(\Rightarrow x=2,5\)

Vậy x = 2,5

_Chúc bạn học tốt_

Answer 2

x . 1,425 + 1,575 . x + x + x1,2 = 13

\(\Rightarrow\)x1,425 + 1,575x + x + x1,2 = 13

\(\Rightarrow\)3x + 2,2x = 13

\(\Rightarrow\)5,2x = 13

\(\Rightarrow\)x = 13 : 5,2

\(\Rightarrow\)x = 2,5

vậy x = 2,5