8x=7,8x+25

8x-7,8x=25

0,2x=25

x=25:0,2

x=125

\(\Leftrightarrow0,2x=25\)

\(\Leftrightarrow x=125\)

a) \(x+\frac{1}{2}=\frac{3}{4}\Rightarrow x=\frac{3}{4}-\frac{1}{2}\)\(\Rightarrow x=\frac{1}{4}\)

b)\(\frac{4}{5}\cdot x=\frac{4}{7}\Rightarrow x=\frac{4}{7}:\frac{4}{5}\)\(\Rightarrow x=\frac{5}{7}\)

c) \(8x=7,8x+25\Rightarrow8x-7,8x=25\)\(\Rightarrow0,2x=25\Rightarrow x=\frac{25}{0,2}\Rightarrow x=125\)

8x=7,8.x+25

8x-7,8x=25

0,2x=25

x=25:0,2

x = 125

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

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

\(\Rightarrow0,2x=25\Rightarrow x=125\)

Vậy x= 125

8x=7,8x+25

8x-7,8x=25

0,2x=25

1/5x=25

x=25:1/5

x=25.5

x=125

là 125

8x- 7,8x = 25

x . 0,2 = 25

x = 25: 0,2

x=125

đề bài hỏi j zậy

thiếu đề 99.999999.....%

8x  = 7,8 .x+ 25

8x - 7,8 .x = 25

0,2 x = 25

     x = 25 : 0,2

     x = 125

8x=1,8x + 25

8x - 7,8x =25

0,2x=25

 x = 25: 0,2

x = 125

X= 125

8x-7,8x=25

0,2x=25

x=25:0,2

x=125

gdsrchbnfeaikdỹ

cau nay co nghia la gi

x+1/2=3/4

x=3/4-1/2
x=6/8--4/8
x=2/8=1/4

4/5.x=4/7
x=4/7:4/5
x=4/7.5/4
x=5/7