Question

Tìm số nguyên x, biết:

50% + \(\dfrac{2}{3}x\) = x + 4

Answer 1

50%+\(\dfrac{2}{3}\)x = x+4

=>\(\dfrac{1}{2}\)+\(\dfrac{2}{3}\)x = x+4

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

=>\(\dfrac{-1}{3}\)x = \(\dfrac{7}{2}\)

=> x = -10,5

Answer 2

\(50\%+\dfrac{2}{3}x=x+4\Rightarrow\dfrac{1}{2}+\dfrac{2}{3}x=x+4\)

\(\Rightarrow\dfrac{2}{3}x-x=4+\dfrac{1}{2}\Rightarrow\dfrac{-1}{3}x=\dfrac{9}{2}\)

\(\Rightarrow x=\dfrac{9}{2}.\left(-3\right)=\dfrac{-27}{2}\)

Vậy, ...