2/3 (x+9/5) – 3/10 . (5x – 1/3) = 7/15

2 bình luận về “2/3 (x+9/5) – 3/10 . (5x – 1/3) = 7/15”

1. 2/3 (x+9/5) – 3/10 . (5x – 1/3) = 7/15

   <=> 2/3.x+2/3 . 9/5 – 3/10 . 5x + 3/10 . 1/3 = 7/15

   <=> 2/3.x+ 6/5 – 3/2 . x + 1/10 = 7/15

   <=>( 2/3+3/2) .x+ (6/5 + 1/10) = 7/15

   <=>13/6 .x+ 13/10 = 7/15

   <=>13/6 .x = -5/6

   <=>x = -5/13

   Vậy x= -5/13

   Trả lời
2. Giải đáp: x=1

    

   Lời giải và giải thích chi tiết:

          2/3(x+9/5)- 3/10.(5x-1/3)=7/15

   ⇒2/3x+6/5-3/2x+ 1/10=7/15

   ⇒2/3x-3/2x=7/15-6/5-1/10

   ⇒-5/6x=-5/6

   ⇒       x=(-5/6):(-5/6)

   ⇒       x=1

   Vậy, x=1

   ~ $kiddd$ ~

   Trả lời