Tìm x 1. 435+(6x-8)=457 2. 15.x-899:29=194 3.100-7.(x-5)=65 4.2480-4710:3+[200-(x-5)]=1010 04/07/2021 Bởi Arya Tìm x 1. 435+(6x-8)=457 2. 15.x-899:29=194 3.100-7.(x-5)=65 4.2480-4710:3+[200-(x-5)]=1010
Bạn tham khảo : 1 . $435+(6x – 8) = 457$ $⇒6x -8 = 22$ $⇒ 6x = 30$ $⇒x =5$ 2 . $15x – 899 : 29 = 194$ ⇒ $15x -899 =5626$ ⇒ $15x =6525$ ⇒ $x =435$ 3 . $100 – 7(x-5) = 65$ ⇒ $7(x -5) =35$ ⇒ $x -5 =5$ ⇒ $x =10$ 4 . $2480 – 4710 :3 + [ 200 – (x-5)] =1010$ $⇒2480 – 1570 + [200-(x-5)] = 1010$ $⇒ 1570 + [200 – (x-5)] =1470$ $⇒ 200 – (x-5) = -10$ $⇒x -5 = 190$ $⇒x = 185$ Bình luận
Bạn tham khảo :
1 .
$435+(6x – 8) = 457$
$⇒6x -8 = 22$
$⇒ 6x = 30$
$⇒x =5$
2 .
$15x – 899 : 29 = 194$
⇒ $15x -899 =5626$
⇒ $15x =6525$
⇒ $x =435$
3 .
$100 – 7(x-5) = 65$
⇒ $7(x -5) =35$
⇒ $x -5 =5$
⇒ $x =10$
4 .
$2480 – 4710 :3 + [ 200 – (x-5)] =1010$
$⇒2480 – 1570 + [200-(x-5)] = 1010$
$⇒ 1570 + [200 – (x-5)] =1470$
$⇒ 200 – (x-5) = -10$
$⇒x -5 = 190$
$⇒x = 185$