Question

giải phương trình \(x-\frac{x+1}{3}=\frac{2x+1}{5}\)

Answer 1

\(x-\frac{x+1}{3}=\frac{2x+1}{5}\)

\(\frac{15x-5\left(x+1\right)}{15}=\frac{3\left(2x+1\right)}{15}\)

15x-5x-5=6x+3

15x-5x-6x=5+3

4x=8

x=2

Answer 2

15x-5(x+1)=3(2x+1)

15x-5x-5=6x+3

15x-5x-6x=3+5

4x=8

x=2

Vậy S={2}
 

Answer 3

x=2 nha bạn