Question

Bài 2: Tìm x

a, 125 x X - X x 47 = 25350

b, 3978 : X - 987 : X = 100

Answer 1

125 . x - x . 47 = 25350

(125 - 47) . x = 25350

78 . x = 25350

x = 325

3978 : x - 987 : x = 100

3978 . 1/x - 987 . 1/x = 100 

(3978 - 987) . 1/x = 100

2991 . 1/x = 100

1/x = 100/2991

x = 2991/100

#Đức Lộc#

Answer 2

mình cần làm gấp

Answer 3

A) 125 * X - X * 47 = 25350

=> X * (125 - 47) = 25350

=> X * 78 = 25350

=> X = 25350 : 78 = 325

Answer 4

B) 3978 : X - 987 : X = 100

<=> 3978 . 1/X - 987 . 1/X = 100

=> 1/X. (3978-987)=100

=>1/X. 2991=100

=> 1/X=100/2991

=> X=1/100/2991

=> X=2991/100