Question

26 x X = 3 x X + 345

Answer 1

=> 23X=345 => x=345/23=15

Answer 2

26 . x = 3 . x + 345 

 => 23x = 345 

=>     x  = 345 : 23 

=>    x  = 15 

Answer 3

26*x=3*x+345

=>23*x+3*x=345+3*x

=>23*x=345

=>x=345:23

=>x=15

Vậy x=15