Question

15x-13= 12x-(-8)

Answer 1

15x-13= 12x-(-8)

15x-13= 12x+8

15x-12x=8+13

         3x=21

           x=21:3

           x=7

Vậy x=7

Answer 2

15x-13= 12x -(-8)

15x - 12x = 13-(-8)

          3x = 21

           x = 21:3

           x=7

hok tốt

Answer 3

Ta có:

\(15x-13=12x-\left(-8\right)\)

\(\Rightarrow15x-12x=13-\left(-8\right)\)

\(\Rightarrow3x=-5\)

\(\Rightarrow x=21:3\)

\(\Rightarrow x=7\)

Vậy \(x=7\)

#Mạt Mạt#