a ) 3/4 . x = 1
=> x = 1 : 3/4
=> x = 1 . 4/3
=> x = 4/3
Vậy x = 4/3
b ) 4/7x = 9/8 - 0,125
=> 4/7x = 9/8 - 1/8
=> 4/7x = 8/8 = 1
=> x = 1 : 4/7
=> x = 1. 7/4
=> x = 7/4
Vậy x = 7/4
Chúc học giỏi
\(\frac{3}{4}x=1\)
\(x=1:\frac{3}{4}\)
\(x=\frac{4}{3}\)