Question

tìm x: 75%.x-0,5.x=3/4

Answer 1

=>0,75x-0,5x=3/4

=>1/4x=3/4

hay x=3

Answer 2

\(75\%\cdot x-0,5\cdot x=\dfrac{3}{4}\)

\(\dfrac{3}{4}\cdot x-\dfrac{1}{2}\cdot x=\dfrac{3}{4}\)

\(\left(\dfrac{3}{4}-\dfrac{1}{2}\right)\cdot x=\dfrac{3}{4}\)

\(\dfrac{1}{4}\cdot x=\dfrac{3}{4}\)

\(x=\dfrac{3}{4}:\dfrac{1}{4}\)

\(x=\dfrac{12}{4}\)

\(x=3\)

Answer 3

x . (3/4 - 1/2 ) = 3/4

x . 1/4            =  3/4

x                    = 3/4 : 1/4

x                    = 3