Question

1. tìm x

x - 25% . x = 0,5

Answer 1

x-1/4.x=1/2

1.x-1/4.x

x.(1-1/4)=1/2

x.3/4=1/2

x=1/2:3/4

x=2/3

Answer 2

x - 25%.x = 0,5

x - 1/4x = 0,5

x.4 - 1/4x.4 = 0,5.4

4x - x = 2

3x = 2

x = 2/3

=> x = 2/3

Answer 3

\(x-\frac{1}{4}x=\frac{1}{2}\)

\(1.x-\frac{1}{4}=\frac{1}{2}\)

\(x.\left(1-\frac{1}{4}\right)=\frac{1}{2}\)

\(x.\frac{3}{4}=\frac{1}{2}\)

\(x=\frac{1}{2}:\frac{3}{4}\)

\(x=\frac{2}{3}\)