m,x-6:2-(48-24.2:6-3)=0 n,460+85.4=(x=200):4 p,[61+(53-x)].17=1785 q,3636:(12x-19)=36

0 bình luận về “m,x-6:2-(48-24.2:6-3)=0 n,460+85.4=(x=200):4 p,[61+(53-x)].17=1785 q,3636:(12x-19)=36”

1. Đáp án:

   $\text{m) x = 40.}$

   $\text{n) Đề sai.}$

   $\text{p) x = 9.}$

   $\text{q) x = 10.}$

   Giải thích các bước giải:

   $\text{m) x – 6 ÷ 2 – (48 – 24.2 ÷ 6 – 3) = 0.}$

   $\text{⇒ x – 3 – (48 – 48 ÷ 6 – 3) = 0.}$

   $\text{⇒ x – 3 – (48 – 8 – 3) = 0.}$

   $\text{⇒ x – 3 – 37 = 0.}$

   $\text{⇒ x – 40 = 0.}$

   $\text{⇒ x = 40.}$

   $\text{Vậy x = 40.}$

   $\text{n) 460 + 85.4 = (x = 200) ÷ 4.}$

   $\text{????? Sai đề rồi em tus ơi.}$

   $\text{p) [61 + (53 – x)].17 = 1785.}$

   $\text{⇒ 61 + (53 – x) = 1785 ÷ 17.}$

   $\text{⇒ 61 + (53 – x) = 105.}$

   $\text{⇒ 53 – x = 105 – 61.}$

   $\text{⇒ 53 – x = 44.}$

   $\text{⇒ x = 53 – 44.}$

   $\text{⇒ x = 9.}$

   $\text{Vậy x = 9.}$

   $\text{q) 3636 ÷ (12x – 19) = 36.}$

   $\text{⇒ 12x – 19 = 3636 ÷ 36.}$

   $\text{⇒ 12x – 19 = 101.}$

   $\text{⇒ 12x = 101 + 19.}$

   $\text{⇒ 12x = 120.}$

   $\text{⇒ x = 120 ÷ 12.}$

   $\text{⇒ x = 10.}$

   $\text{Vậy x = 10.}$

   Bình luận