Question

x+500=400x2

Answer 1

x + 500 = 400 x 2

x + 500 = 800

x = 800 - 500

x = 300 

Answer 2

300 nhá

Answer 3

x+500=400x2

x+500=800

x=800-500

x=300

Answer 4

x + 500 = 400 x 2 

x + 500 =  800

x           = 800 - 500

x           =  300

Answer 5

x + 500 = 400 x 2 

x + 500 = 800

         x = 800 - 500

         x = 300                               k mk nhaTiến Dũng

Answer 6

x+500=400x2

x+500=800

     x  =800-300

     x  =500.

Answer 7

Ta có x+500=400*2

\(\Rightarrow x+500=800\\ \Rightarrow x=800-500=300\)