Question

3.x-3=5.x-3

Answer 1

(X-5):5=(X-9):8

\(\frac{x}{5}\)-1=\(\frac{x}{8}\)-\(\frac{9}{8}\)

\(\frac{x}{5}\)-\(\frac{x}{8}\)=-\(\frac{9}{8}\)+1

\(\frac{8x-5x}{40}\)=\(\frac{-9+8}{8}\)

\(\frac{3x}{40}\)=\(\frac{-1}{8}\)

3x=\(\frac{-1}{8}\).40

3x=-5

x=\(\frac{-5}{3}\)

Answer 2

làm dầy nhanh hơn

3.x-3=5.x-3

3.x-5.x=-3+5

3.x-5.x=2

x.(3-5)=2

x.[3+(-5)]=2

x.(-2)=2

x=(-2):2

x=1

Answer 3

3.x-5=5.x-3

3x-5x=-3+5

3x-5x=2

x.(3-5)=2

x.(-2)=2

x=-2:2

=>x=-1