Question

[Nguyen Thuy Trang]

X : 100 + X : 10 + X  9,89 = 12,35  

Answer 1

[Nguyễn Hoàng Tùng]

\(x:100+x:10+x.9,89=12,35\\ x\times0,01+x\times0,1+x\times9,89\\ x\times\left(0,01+0,1+9,89\right)=12,35\\ x\times10=12,35\\ x=1,235\)