Question

bài 1

a, 8x= 7,8x + 25

Answer 1

a, Ta có :

8x = 7,8x + 25

8x - 7,8x = 25

( 8 - 7,8 )x =25

1/5 x = 25

x = 25 : 1/5

x = 125

Vậy x = 125 .

Answer 2

\(8x=7,8x+25\\ 8x-7,8x=25\\ 0,2x=25\\ x=25:0,2\\ x=25:\frac{1}{5}\\ x=25\cdot5\\ x=125\)Vậy x = 125

Answer 3

8x= 7,8x + 25 → 8x - 7,8x = 25 → 0,2x = 25 → x = \(\dfrac{25}{0,2}\)

→ x = 125 Vậy x = 125

Answer 4

a) \(8x=7,8x+25\)

\(\Rightarrow8x-7,8x=25\)

\(\Rightarrow0,2x=25\)

\(\Rightarrow x=\frac{25}{0,2}=125\)

Vậy \(x=125\)

Answer 5

có a phải có b chứ bn

Answer 6

8x = 7,8 x + 25

↔ 8x - 7,8x =25

↔ 0,2x = 25

↔ x = 125

Answer 7

a, 8x = 7,8x + 25

8x - 7,8x = 25

0,2x = 25

x = 25 : 0,2

x = 125