Question

Tìm x biết :

                    8 x = 7,8 x + 25

            

Answer 1

Trả lời

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

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

\(\Rightarrow0,2x=25\)

\(\Rightarrow x=25:0,2\)

\(\Rightarrow x=125\)

Vậy x=125

Answer 2

\(x=125\)

Answer 3

8x = 7,8x + 25

8x - 7,8x = 25

0,2x = 25

x = 125

Tk mk nha!

Answer 4

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

\(\frac{39}{5}x+25=8x\)

\(\Rightarrow8x-\frac{39}{5}x=25\)

\(\Rightarrow\frac{1}{5}x=25\)

\(\Rightarrow x=25\div\frac{1}{5}\)

\(\Rightarrow x=125\)

Answer 5

8x - 7,8x = 25

0,2x = 25

x = 125

Answer 6

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

\(\Rightarrow7,8x-8x=-25\)

\(\Rightarrow-0,2x=-25\)

\(\Rightarrow x=-25:\left(-0,2\right)=125\)