Question

(x-280)/13+(x--420)/13=x/10

Answer 1

=>(x-280)/13*(10/10)+(x-420)/13*(10/10)=x/10 *(13/13)

=>10(x-280)/130+10(x- 420)/130=13x/130 =>10(x-280)+10(x-420)=13x

=>10x-2800+10x-4200=13x =>20x-13x=2800+4200 => 7x=7000 => x=1000