Question

Tìm x :

 a . X x 9.99 + X : 100 = 9.8

 b. X : 2/3 + X: 2/5 + X =1

Answer 1

a, X:100/999 + X:100=9,8

X:(100/999+100)=9,8

X;100000/999=9,8

X=9,8x10000/999

X=98000/999

Answer 2

b>x.2/3+x.5/2+x=1

x.(2/3+5/2+1)=1

x.25/2=1

x=6/25 Nhớ k nha

a> x.9,99+x:100=9.8

   x.9,99+x.0,01=9,8

    x.10,09=9.8

    x=980/1009